Radius, rectum, retina, ribs, ruby blood cells, rotator cuff, ribcage, rectus abdominis, rhomboids, and rectus femoris are all trunk parts that start with the letter "R." Ii major body systems, reproductive and respiratory systems, also commencement with the alphabetic character R. Some trunk parts have informal names or nicknames that kickoff with the alphabetic character, such as rump, roof of the mouth, or ring finger. Finally, when there are ii of a body part, a person may use terms similar correct leg, right arm, right center, right elbow, right ear, right ovary, right foot, right mitt, or right kidney to describe them.
Radius
The radius is one of the 2 major bones that make up the forearm. The other is the ulna. The radius joins the wrist and hand together, and information technology's one of the nearly frequently broken bones.
Rectum
The rectum is the cease of the large intestine that occurs just earlier the anus. Information technology holds feces until a person defecates.
Retina
Part of the heart, the retina is a thin layer of tissue that receives light and converts information technology so that the brain can come across information technology. Damage to the retina may consequence in permanent blindness.
Ribs and Rib Cage
The rib cage is a group of bones called ribs that protect the chest crenel and many vital organs. Most humans have 24 ribs.
Red Blood Cells
Red claret cells are the part of the blood that behave oxygen from the lungs to the rest of the trunk. If a person does not have enough red blood cells, he or she may be described equally anemic. This condition can brand i feel tired, weak, dizzy, or lightheaded. It can also atomic number 82 to shortness of breath, irregular heartbeat, headaches, chest pain, and common cold extremities.
Rotator Cuff
Made up of muscles and tendons, the rotator cuff is what keeps the upper arm bone in place in the shoulder's socket. Without it, y'all couldn't lift your arms, turn your artillery, swim, or play many sports that require you to swing a noise or bat. A torn rotator cuff, which happens when the body function is overused, is a common injury.
Rectus Abdominis
The rectus abdominis is an abdominal muscle that runs from the sternum downward to the pubic bone. Anyone who has e'er worked toward "six-pack abs" was working towards a strong rectus abdominis. The muscle is important for a number of activities, ranging from giving nascence to simply coughing.
Rectus Femoris
Located in the thigh, the rectus femoris crosses over the knee and hip. It helps with flexing the hip and the power to move the genu ninety degrees. Some people have a shorter or longer rectus femoris, which may bear on their ability to extend their hips and knees fully.
Rhomboids
The rhomboids are the muscles in the upper back that are responsible for posture. They connect between the spine and shoulder blades, and when they're contracted, the pull the shoulder blades together to support the dorsum. When the muscles get overstretched, a person may develop kyphosis, or a hunched or curved spine
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