Human Body Parts That Start with A | 30+ Words Included that You Never Knows

Did you know that there are human body parts that start with “A” letter? In this blog post, we will be discussing some of them. We will also provide information about each part and what it does in the body. Keep reading to learn more!

Human Body Parts That Start the Letter with A

Many human body parts start with the letter A. Some of these body parts are essential for survival, while others are not. It’s essential to know all the parts that make up the human body. The following are some human body parts that start with the letter A:

Discussion about the Parts:

• Abdomen: The abdomen is one of the human body’s four major anatomical regions (the other three being the chest, pelvis, and legs), but there’s a lot more to this tasty little morsel than meets the eye.
• Abdominal Arteries: The abdominal arteries are the main artery supplying blood to the abdomen and pelvis. An artery originates from the left ventricle of the heart and passes through the diaphragm before splitting into two branches (the common iliac arteries), which supply blood to the lower half of the body.
• Abdominal Cavity: In the human anatomy, the abdominal cavity consists of the space between the diaphragm and the pelvis. It contains many of the body’s organs, including the stomach, liver, gallbladder, pancreas, and intestines.
• Abdominal Muscles: The abdominal muscles are a group of muscles located in the front of the human body. They are responsible for supporting the lower back and internal organs, such as the stomach and intestines.
• Abdominal Veins: The abdominal veins are a network of blood vessels that return blood from the abdominal organs to the heart. The three main abdominal veins are the superior, middle, and inferior vena cava.
• Abducent Nerve: The abducent nerve is a cranial nerve that innervates the lateral rectus muscle, abducting the eye (moving away from the median line). This nerve is responsible for keeping your eyes parallel to each other and allows you to move them in all directions.
• Abductor Digiti Minimi Muscle: The abductor digitimi minimi muscle is a small, triangular muscle located in the palm. It is responsible for moving the little finger away from the thumb. The abductor digitimi minimi is one of several muscles that make up the thenar eminence, a rounded mound of muscle at the base of the thumb.
• Accessory Nerve: An accessory nerve innervates the sternocleidomastoid and trapezius muscles. It is the eleventh of twelve cranial nerves and arises from the brainstem, specifically from the medulla oblongata.
• Acetabulum: The acetabulum is a large, cup-shaped bone in the pelvis that forms the socket of the hip joint. It results from the fusion of three bones: the ilium, ischium, and pubis. The acetabulum provides a strong foundation for the femur to attach to and pivot on during movement.
• Acromioclavicular Joint:  The acromioclavicular joint (ACJ) is a small, gliding synovial joint located between the lateral end of the clavicle and the superior surface of the acromion. It receives blood from the lateral and posterior circumflex humeral arteries.
• Anal Sphincter, External: It has two main muscles: puborectalis and iliococcygeus. Puborectalis connect the rectum to the pelvis, while iliococcygeus supports the pelvic organs. These muscles work together to keep feces in the rectum until you get rid of them.
• Ankle Joint Ligaments: The human ankle is a complex joint composed of ligaments, bones, and muscles. There are three major ligaments in the ankle: the anterior talofibular ligament (ATFL), the posterior talofibular ligament (PTFL), and the calcaneofibular ligament (CFL). As a result of these ligaments providing stability to the ankle joint, the ankle becomes more stable.
• Ankle Joint, Deltoid Ligament: The deltoid ligament is a strong, broad ligament covering the ankle joint’s outside. It helps to stabilize the joint and prevent it from dislocating. The deltoid ligament consists of four main parts: the talonavicular portion, the talonavicular portion, the calcaneofibular portion, and the posterior tibialis tendon. Each of these parts has an essential role in stabilizing the ankle joint.
• Ankle Muscles: The ankle muscles are responsible for dorsiflexion and plantarflexion of the ankle joint. In dorsiflexion, the toes point toward the shin, while the heel points away from the body in plantar flexion.
• Anterior Cerebral Artery: The anterior cerebral artery (ACA) is a branch of the internal carotid artery that supplies blood to the frontal lobe and other brain areas. It’s one of two main arteries that supply blood to the brain, and it’s responsible for providing oxygen and nutrients to the brain cells in the frontal lobe.
• Anterior Communicating Artery: The anterior communicating artery is a small but essential vessel in the human body. It connects the two frontal lobes of the brain and is responsible for carrying blood between them.
• Anterior Longitudinal Ligament: The Anterior Longitudinal Ligament (ALL) is a ligament in the human body. It runs along the front of the spinal cord and lies in the anterior portion of the vertebral column.
• Anterior Scalene Muscle: The anterior scalene muscle is one of the four scalene muscles of the neck. It arises from the first rib and inserts into the side of the cervical vertebrae. The anterior scalene muscle helps elevate the first rib and assists in inhalation.
• Annular Ligament: The Annular Ligament is a small, donut-shaped ligament in the shoulder joint. Mainly, it maintains stability in the shoulder joint and prevents the top of the arm bone (humerus) from slipping out of the socket.
• Aorta: The aorta is one of the large arteries responsible for carrying blood away from the heart. It splits into many smaller arteries that supply blood to all body parts. The aorta is about 2 inches wide in men and 1.5 inches wide in women. It is about 10-12 inches long.
• Arachnoid Membrane: The arachnoid membrane is one of three membranes that line the inside of the skull and protect the brain. It is also known as the pars membranacea, or middle layer, of meninges. The other layers are the tough outer dura mater and the soft inner pia mater.
• Arm: The arm is one of the body parts that make up the human anatomy. It consists of three bones: the humerus, radius, and ulna. To move an arm, muscles, tendons, and ligaments work together.
• Arm Muscles: Arm muscles are a vital part of the human body. They help us move our arms and hands and play an essential role in our everyday activities. There are two types of arm muscles: superficial and deep muscles. The superficial muscle is located on the surface of the arm and is responsible for moving the arm and hand.
• Arterial Circle: The arterial circle is a vital part of the human body. It helps pump blood around the body and delivers oxygen and nutrients to the tissues and organs.
• Ascending Aorta: An ascending aorta is the first part of the aorta, which carries blood from the heart to the body. It begins just after the left ventricle, the bottom chamber of the heart, and runs up through the chest to the neck.
• Atlas Vertebra, Anterior Arch: The Atlas Vertebra, also called the atlas bone or first cervical vertebra is a small, cylindrical vertebra located in the human neck. It supports the head and helps to protect the spinal cord. The anterior arch of the atlas vertebra is a raised ridge on the front of the bone that forms part of the spine.
• Atrial Appendage (Auricle): The atrial appendage, also known as the auricle, appears as a small, wing-shaped protrusion on top of the heart. While its primary function is to help pump blood into the ventricles, it also plays a role in stabilizing the heart’s electrical activity. In some cases, you can remove the atrial appendage surgically to prevent Stroke.
• Auditory Tube: The auditory tube is a narrow canal that connects the middle ear to the back of your throat. It runs from behind the nose to just in front of the ears. Air flows in and out of the auditory tube to equalize pressure on both sides of the eardrum.
• Auditory Tube, Cartilage: The auditory tube is a small canal that connects the middle ear to the pharynx or throat. It also plays a role in equalizing pressure on either side of the eardrum. The tube is about 2.5 cm long and covered with a mucous membrane.
• Axillary Artery: The axillary artery is part of the body’s network of significant arteries responsible for carrying oxygen-rich blood to the chest, arms, and hand. It arises from the brachial artery, a large artery that carries blood from the heart to the shoulder, arm, and hand.

Conclusion

So, there you have it – a comprehensive guide to body parts that start with A. I hope this post has been beneficial to you and has helped you learn something new. Thanks in advance for reading and sharing our blog. Stay tuned for more exciting stuff about the human body.