PPT-Muscles Move You!

Objective To learn the structure and function of the Muscular System Bell Work Muscles need lots of energy to complete their job Which organelle do you think is most abundant inside muscle cells. Muscles of girdles and appendages. Innervated by ventral ramus of spinal nerves. Key Point. What is a girdle?. What is a ramus/rami?. Appendicular Muscles - fish. Originated as extensions of hypaxials of body wall. * move the forearm (elbow) . 1. . biceps . brachii. * L: anterior upper arm. * A: flexes elbow, . supinates. hand . 2. . brachialis. * L: medial upper arm. * A: flexes elbow. 3. . triceps . 1. Muscles of the Thoracic Wall. a. . intercostals (external/internal). * L: between ribs. * A: elevate/depress rib cage (breathing). Origin:. . Inferior border of rib above. . Human Body. Frontalis. – Elevates eyebrow. Orbicularis. . oculi. – Flexes eye. Zygomaticus. – Elevates lips. Orbicularis. . oris. – Flexes lips. Masseter. – Elevates mandible. Muscles of the Head/Face. Interesting Muscle Facts. Thirty facial muscles create looks like surprise, happiness, sadness, and frowning. Eye muscles are the busiest muscles in the body. Scientists estimate they may move more than 100,000 times a day. The . sliding . filament theory . of . muscle contraction. Gross . and microscopic structure of skeletal muscle. The . ultrastructure. of a myofibril.. The . roles of . actin. , myosin, calcium ions and ATP in myofibril contraction.. Muscle. Origin. Insertion. Action. *Rectus . Abdominis. Pubis. Ribs, . Xyphoid. Process. Flexes. and rotates lumbar vertebrae. *External . Oblique. Ribs. Pubis, Ilium, Linea Alba. Flexes vertebral column. Muscles and Their Movements. Muscles move our bones which move our body. . Flexing: Creating less space at the joint. Extending: Creating more space at the joint. Muscles and Their Movements. Extending knee . Objectives. Identify tender, intermediate, and tough muscles. List specific muscles in various steaks. What steaks are the most tender?. Tender Muscles. Examples:. Psoas major-. . Loin, on the back. Over 600 in the human body. Allow the skeleton to move. To cause movement, both ends of each muscle must be attached to bone. Origin or proximal attachment – the attachment closer to the center of the body. Muscles of Swallowing. Muscles of Swallowing. The anterior portion of the neck is divided into the suprahyoid and infrahyoid muscle groups.. . Muscles of Swallowing. The anterior portion of the neck is divided into the suprahyoid and infrahyoid muscle groups.. Ppt. # 8. 10-. 2. Muscles of Facial Expression. muscles that insert in the dermis and subcutaneous tissues. tense the skin and produce facial expressions. innervated by facial nerve (CN VII). paralysis causes face to sag. Origin:. the immovable end of the muscle; attached to a relatively immovable bone. Insertion:. the end of the muscle attached to a movable bone. **When a muscle contracts, its insertion is pulled toward its origin.. Anterior and Posterior Trunk Muscles. Arm and Shoulder Muscles. 207-209. Table 6.3 Superficial Anterior Muscles of the Body (See Figure 6.22) (2 of 3).. Figure 6.17a . Muscles of the anterior trunk, shoulder, and arm..