What muscles belong to the chest and abdomen?
The intercostal muscles form the chest wall and function in respiration. The diaphragm is a sheet-like muscle that extends underneath the rib cage and aids in respiration by physically moving the lungs. The obliques are abdominal muscles that assist during bending and twisting of the torso.
What is the muscle between abs and chest?
Rectus abdominis muscle
| Rectus abdominis | |
|---|---|
| Origin | Crest of pubic |
| Insertion | costal cartilages of ribs 5-7 Xiphoid process of sternum. |
| Artery | inferior epigastric artery |
| Nerve | segmentally by thoraco-abdominal nerves (T7 to T11) and subcostal (T12) |
What is the chest and abdomen called?
thoracic cavity, also called chest cavity, the second largest hollow space of the body. It is enclosed by the ribs, the vertebral column, and the sternum, or breastbone, and is separated from the abdominal cavity (the body’s largest hollow space) by a muscular and membranous partition, the diaphragm.
What muscle is in the chest or torso?
pectoralis major
The pectoralis major, the larger and more superficial, originates at the clavicle (collarbone), the sternum, the ribs, and a tendinous extension of the external oblique abdominal muscle.
What are the abdominal muscles for?
The abdominal muscles support the trunk, allow movement and hold organs in place by regulating internal abdominal pressure. The deep abdominal muscles, together with muscles in the back, make up your ‘core’ muscles and help keep your body stable and balanced, and protects your spine.
What organ is between your breasts?
The thymus is a small organ located just behind the breast bone (sternum) in the front part of the chest.
Which muscles are in the chest?
Muscles of the Chest and Their Functions You have two mighty muscles on both sides of your chest: The pectoralis major and the pectoralis minor, known collectively as your pecs.
How many muscles are in the chest?
Nine muscles of the chest and upper back are used to move the humerus (upper arm bone). The coracobrachialis and pectoralis major muscles connect the humerus anteriorly to the scapula and ribs, flexing and adducting the arm toward the front of the body when you reach forward to grab an object.
What are the 4 abdominal muscles?
The abdominal muscles are made up of four muscle groups. These muscles are the rectus abdominus , transversus abdominus, internal oblique, and external oblique muscles. This group of muscles helps to stabilize the trunk, provide organ stability, and assist in flexion and rotation of the trunk.
What are the names of the chest muscles?
The dominant muscle in the upper chest is the pectoralis major. This large fan-shaped muscle stretches from the armpit up to the collarbone and down across the lower chest region on both sides of the chest. The two sides connect at the sternum, or breastbone.
What are the names of the abdominal muscles?
abdominal muscles. The abdominal muscles are made up of the cremaster, external abdominal oblique, iliacus, psoas major, pyramidalis, quadratus lumborum, rectus abdominis, and transversus abdominis muscles.
What are muscles in the chest?
The chest is made up primarily of two muscles: (1) the pectoralis major, and (2) the pectoralis minor.