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Human Body Parts That Start With S | 45+ Essential Parts of Human Body

Human Body Parts That Start With S

Many human body parts start with S. Some of these are the esophagus, the stomach, and the small intestine. We will break down each body part in this post and provide some fun facts. We hope that this information will help you better understand your own body and how it works! So, without further due, let’s get started!

Human Body Parts That Start With S

The human skeleton is one of the most important body parts. It is responsible for giving our bodies structure and support. The skull is another essential body part that starts with “S.” It protects the brain and other delicate organs in the head. These are some parts of the body that begin with the letter S:

Sacral Skull Stylohyoid muscle
Sacroiliac joint Skull, individual named bones Styloid process
Sagittal sinus Soft palate Sub-arachnoid space
Saphenous vein Spermatic cord Subclavian artery
Scalene muscles Sphenoid sinus Subclavian vein
Scapula Sphenoid sinus, opening Submandibular gland
Scapula, movements Spinal accessory nerve Suboccipital muscles
Scapular muscles Spinal cord Superficial peroneal nerve
Sciatic foramen Spinal ligaments Superior alveolar nerves
Sciatic nerve Spinal nerves Superior cerebellar arteries
Semicircular ducts Spinal nerves, filaments Superior constrictor muscle
Short saphenous vein Spleen Superior oblique muscle
Shoulder joint ligaments Stapes Superior orbital fissure
Shoulder muscle Sternoclavicular joint Superior rectus muscle
Shoulder region Stomach Sympathetic trunk

Discussion about the Parts

  • Sacral: The sacral region resides at the bottom of the spine, between the hipbones. It consists of 5 vertebrae (sacral bones), which are fused. The sacral bones are connected to the hip bones and form the socket for the pelvis. Additionally, they provide attachment points for the ligaments and muscles found in the lower back and buttocks.
  • Sacroiliac joint: The sacroiliac joint is where the spine meets the pelvis and lower extremities. This joint is what allows you to move your hips and legs. The body part sacroiliac joint is very important, and it can be quite painful when it is not working correctly. Many problems can affect the sacroiliac joint, including arthritis, injury, and pregnancy. Treatment for these problems depends on the specific cause but often includes physical therapy, steroids, or surgery.
  • Sagittal sinus: The sagittal sinus is a large vein that carries blood from the brain and upper extremities to the heart. The sagittal plane it’s a vertical plane that divides the body into two symmetrical halves. This vein receives blood from veins in the scalp, face, and neck. It empties into the right atrium of the heart. The sagittal sinus is essential because it helps to regulate blood pressure in the head and neck.
  • Saphenous vein: The saphenous vein is large in the human body that carries blood from the lower leg back to the heart. It is one of the two superficial veins in the leg (the other being the great saphenous vein) and is located parallel to and just beneath the skin.
  • Scalene muscles: The scalene muscles are three paired muscles in the human body. They’re in the neck, and each muscle attaches to a different vertebra. The scalene muscles are responsible for bending and rotating the neck, and they also help raise the shoulder blade. These muscles can be easily injured, especially if you hyperextend your neck.
  • Scapula: The scapula, also known as the shoulder blade, is a long, flat bone that protrudes from the back of the shoulder. It is one of the main bones of the upper extremity and serves as an attachment point for several muscles of the arm, chest, and back. The scapula has a slightly curved shape and sits between the clavicle (collarbone) in front and the thoracic cage (ribcage) in back. Strong ligaments hold it in place at these points, which allow for a wide range of motion at the shoulder joint.
  • Scapula, movements: The scapula is a triangular-shaped bone in the upper back, lateral to the spine. Many muscles attach to it, including the trapezius, rhomboids, and deltoids. Because of its location and role in stabilizing the shoulder joint, the scapula plays an important role in the movement.
  • Scapular muscles: The scapular muscles are a group of four muscles that attach the shoulder blade to the spine. They stabilize the shoulder blade and move it upwards and downwards. The four muscles that make up the scapular muscle group are the trapezius, levator scapulae, rhomboids, and serratus anterior.
  • Sciatic foramen: The sciatic foramen is a small opening on the back of the human leg that allows the sciatic nerve to pass through. It runs from the spine to the buttocks and feet and runs the longest nerve in the body. The area is just below the waist, between the hipbone and the lower back. It’s about an inch wide and half an inch deep. The foramen gets its name from the sciatic nerve, passing through it to the feet.
  • Sciatic nerve: The sciatic nerve is the largest single nerve in the human body. It originates in the lower back and runs down both legs, providing sensation and strength to the thighs, knees, calves, and feet. Symptoms of an injured or compressed sciatic nerve can include pain, tingling, numbness, or weakness in the leg or foot.
  • Semicircular ducts: Semicircular ducts are endocrine glands found in the human body. These ducts are responsible for secreting several hormones, including adrenaline and cortisol. Several hormones secreted by the semicircular ducts control the body’s stress response. These glands are in the head and neck region. Each duct is about 2.5 centimeters long and 1 centimeter wide. Brain stem and cranial nerves connect to the ducts.
  • Short saphenous vein: The short saphenous vein (SSV) is a vein in the human body. It is a superficial vein and is one of the veins that collect blood from the leg. The SSV begins at the ankle and runs up the inside of the leg, ending at the groin. It is about 5-7 inches long.
  • Shoulder joint ligaments: Shoulder joint ligaments are the soft tissues that connect bones and hold them in place. There are four main shoulder joint ligaments:
  1. The coracoclavicular ligament
  2. The acromioclavicular ligamen
  3. The Glen humeral ligament
  4. The transverse humeral ligament
  • Shoulder muscle: The shoulder is a human body part that makes up of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone). The shoulder joint is a ball-and-socket joint. The head of the humerus goes into what is called the glenoid cavity, or the space within the scapula in which the headrests. The shoulder muscles allow you to raise your arm to your side and rotate it outward.
  • Shoulder region The shoulder region is a very important part of the human body. It is involved in almost all of our activities and facilitates a wide range of movement. This is susceptible to many injuries because it contains many small muscles and tendons. Some common shoulder injuries include rotator cuff tears, impingement syndrome, and bursitis. Treatment for most shoulder injuries typically involves a combination of rest, ice, compression, elevation (RICE), and physical therapy or surgery.
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  • Skull: The human skull has 22 different bones, which work together to protect your brain, spinal cord, and other delicate tissues. The skull also provides attachment points for the muscles that move your head and face. The skull bones are held together by rigid straps of tissue called ligaments, and weaker areas have plates of dense connective tissue called sutures. This construction makes the skull incredibly strong and resistant to injury.
  • Soft palate: The soft palate is a human body part located at the back of the mouth. It consists of muscle and tissue, separating the oral cavity from the throat. The soft palate has two main functions: to close off the nasal passage during swallowing and to produce speech sounds. Velum is a slightly thinner version of the soft palate. It is a movable flap of tissue that hangs down from the roof of the mouth. When you swallow, your brain signals for your velum to elevate, which closes off your nasopharynx (the upper part of your throat that leads to your nose).
  • Spermatic cord: The spermatic cord is a vital structure that helps transport sperm from the testes to the penis. It also contains critical nerves and blood vessels that provide nutrients and oxygen to the sperm. The spermatic cord consists of several components, including the vas deferens, epididymis, and seminal vesicles.
  • Sphenoid sinus: The Sphenoid sinus is a bone in the human body parts. You will find it located in the middle of your face, and it performs a variety of functions. The sinus covers the optic nerve and helps to protect the brain from infection. It also plays a role in the drainage of mucus from the nose. The sinus gets its name after its shape, which resembles a butterfly.
  • Sphenoid sinus, opening: The sphenoid sinus is a small, air-filled cavity located in the center of the skull between the eyes. It’s one of the paranasal sinuses, a series of hollow spaces in the bones of the head that help lighten the head and reduce its weight. The sphenoid sinus is unique in that it has several openings into it. One opens into each nostril and two more open into the nasal cavity behind the ethmoid bone. These openings allow mucus from inside the nose to drain and help keep your nasal passages clear.
  • Spinal accessory nerve: The spinal accessory nerve (SAN) is a cranial nerve that innervates the trapezius and sternocleidomastoid muscles. It comes from the ventral rami of cervical spinal nerves 1-5. The SAN is responsible for shrugging your shoulders and turning your head.
  • Spinal cord: It comes from the brainstem and goes to the lower back. It is long, thin, and filled with nerves. It is about as thick as a human finger and consists of 31 pairs of nerve roots. These nerves carry impulses between the brain and other body parts, including the muscles, skin, and internal organs. The vertebral column protects the spinal cord. As a result, it plays an essential role in various bodily functions, including the regulation of movement, sensation, and balance.
  • Spinal ligaments: The spinal ligaments are a group of tough, fibrous tissues that connect the spinal column’s vertebrae and keep them in alignment. These ligaments can get injured through sudden trauma or repetitive stress, such as sports or heavy lifting. Symptoms of a spinal ligament injury can include pain, inflammation, and a limited range of motion.
  • Spinal nerves: The human body consists of 31 pairs of spinal nerves; however, they are not all connected. Each nerve is responsible for transmitting signals between the brain and a particular region of the body. Spinal cords are bundles of nerve cells that run from below the waist to the base of the brain.
  • Spleen: The spleen is a part of the human body located in the abdomen. Its primary function is to store red blood cells and filter the blood. When blood vessels are damaged, red blood cells get released into the bloodstream, where they cause inflammation. The spleen also helps to fight infection by producing special white blood cells.
  • Stapes: The stapes are one of the middle ear’s three bones. It is also known as a stirrup because of its shape. All hearing Bones connect, and they work together to convey sound from the air to the inner ear. A membrane attaches the footplate (base) of the stapes to a small opening in the skull called the oval window. A sound wave hits the eardrum and creates vibrations that travel through the bones to the cochlea, causing electrical impulses to travel to the brain.
  • Sternoclavicular joint: The sternoclavicular joint is a joint located in the human body where the clavicle (collarbone) meets the sternum (breastbone). It is a ball-and-socket joint that can move in an extensive range of motions because it is a ball-and-socket joint. The Sternoclavicular joint is responsible for connecting the shoulder girdle to the thoracic cage and plays an essential role in both movement and stability.
  • Stomach: The stomach is a part of the human body that performs several vital functions, including digesting food, breaking down protein, and storing food. The stomach’s in the abdomen, just below the ribcage. The stomach is a muscular organ that measures about 12 inches long and 3 inches wide. It has four main sections: the cardia, the corpus, the antrum, and the pylorus. The cardia is at the top of the stomach and is where food enters. The corpus is the main section of the stomach and is where most of the digestion occurs.
  • Stylohyoid muscle: This small, thin muscle is attached to the styloid process of the temporal bone and the hyoid bone. It is responsible for elevating and depressing the hyoid bone during speech and swallowing.
  • Styloid process: The styloid process is a small, calcified projection extending from the temporal bone’s lower border. It’s called that for its resemblance to a pen or stylus. The styloid process arises from the apex of the lateral tympanic membrane and projects posterolateral.
  • Sub-arachnoid space: The subarachnoid space is the space that surrounds the brain and spinal cord. It’s filled with cerebrospinal fluid (CSF), which acts as a cushion and shock absorber for these vital organs. The CSF comes from the choroid plexus, a series of specialized blood vessels that line the brain’s ventricles (hollow cavities). As the CSF travels through the subarachnoid space, it enters and exits the spinal canal.
  • Subclavian artery: The subclavian arteries are a pair of arteries that supply blood to the front and sides of the body up to the head. The right subclavian artery puts blood into the right side of the head and body, while the left subclavian artery puts blood into the left side of the head and body. These arteries branch off from the brachiocephalic trunk, a large vessel that arises from the aortic arch.
  • Subclavian vein: The subclavian vein is the large vein that carries blood from the upper body to the heart. That’s in the chest, just under the collarbone. The subclavian vein has two main parts: the superior vena cava and the inferior vena cava.
  • Submandibular gland: It is a salivary gland located in the front part of the lower jaw, just below the submandibular gland. It produces saliva, which helps to keep the mouth moist and aids in digestion. The saliva produced by the submandibular gland also contains enzymes that help to break down food. 
  • Superficial peroneal nerve: It is a branch of the sciatic nerve that passes through the superficial peroneal nerve. It originates in the lumbosacral plexus and innervates the skin on the leg and foot’s lateral (outside) surface. The superficial peroneal nerve supplies sensation to the lower leg and provides motor function to some of the muscles in the foot.
  • Superior alveolar nerves: The superior alveolar nerves are two cranial nerves located in the head. They originate from the brainstem and go to the upper teeth and gums. The superior alveolar nerves are responsible for carrying sensation from the upper teeth, palate, and gums to the brain. They also control the movement of the muscles that lift the upper lip.
  • Superior cerebellar arteries: The superior cerebellar arteries are two small arteries that supply blood to the cerebellum. It’s thought that lesions or damage to the cerebellum may cause movement or balance problems as it coordinates the coordination of movement and balance.
  • Superior constrictor muscle: The superior constrictor muscle is a muscle in the human body. It is located in the pharynx and helps move food boluses from the mouth to the esophagus. It also contracts during swallowing to help propel food down the throat. The superior constrictor muscle is also responsible for closing off the nasopharynx during Sneezing, Coughing, and Yawning. 
  • Superior oblique muscle: This muscle belongs to the group of extraocular muscles. It is a thin, strap-like muscle that originates from the upper, outer part of the orbit (eye socket). It inserts into the back of the eyeball.
  • The superior oblique muscle acts to depress, intort (turn inward), and abduct (move outward away from the midline) the eye. In other words, when the superior oblique muscle contracts, it pulls the eye downward and toward the nose. This action is crucial for normal binocular vision and for tracking moving objects.
  • Superior orbital fissure: The superior orbital fissure in the skull is the space between the cranial cavity and the orbit of the eye, which connects the two. It’s located on the upper part of the eye socket and allows for the passage of nerves and blood vessels between the two cavities.
  • Superior rectus muscle: The superior rectus muscle is a muscle located in the upper part of the human body. It attaches to the top of the eyeball and helps move it up and down. The superior rectus muscle is one of six muscles that control eye movement.
  • Sympathetic trunk: The sympathetic trunk is a long, thin bundle of nerves that runs down the middle of your body. It controls all the activities of your “fight or flight” response and is responsible for increasing your heart rate, making your pupils dilate, and making you sweat.

Conclusion

Now that we’ve explored some of the human body parts that start with S. Did you know, for instance, that saliva comes from three salivary glands? Or that the spleen filters blood and removes damaged red blood cells? Learning about the functions of our body parts can help us better understand how they work and keep us healthy. Make sure you share this post with your friends and family – knowledge is power.

 

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