1. Muscular System Objectives: 1.Review anatomical terminology. 2.Review types of joint movements. 3.Compare and contrast types of muscle.

2. What is the opposite of: 1.Inferior 2.Anterior 3.Medial 4.Distal 5.Superficial

3. More review and assignments: Figure 17-2 (Lab Manual) Venn diagram of the three types of muscle. Add any other general information you know about muscle. Homework: –Add Chapter 8 roots, prefixes, and suffixes to medical terminology sheet (Vocabulary quiz on Wednesday!!!) –Medical journal article on a disease or disorder of the muscular system due on test day

4. Muscle Tissues 1.Skeletal muscle tissue (“voluntary”) –Long, threadlike cells –Striations: alternating light and dark cross- markings –Each cell has many nuclei just beneath the cell membrane.

5. Muscle Tissues (cont.) 2. Smooth muscle tissue (“involuntary”) –No striations –Cells are shorter than skeletal muscle, spindle- shaped, and have one, centrally located nucleus. –Line walls of internal organs

6. Muscle Tissues (cont.) 3. Cardiac muscle tissue – heart –Striated and joined end-to-end –Each cell has only one nucleus. ???

7. Types of Muscle Tissue (p.185):

8. Skeletal Muscle Actions Movement depends on type of joint the muscle is associated with Origin & Insertion: –Origin – the end of the muscle that is fastened to a relatively immovable or fixed part –Insertion – the end connected to the movable part on the other side of the joint –When muscles contract, its insertion is pulled toward its origin (EX: biceps brachii)

9. Interaction of Skeletal Muscles Prime mover – the muscle responsible for MOST of the movement (aka, agonist) Synergist - ??? Antagonist - ???

10. Major Skeletal Muscles Names may indicate location, size, shape, action, number of attachments, or direction of muscle fibers: Pectoralis major Deltoid Extensor digitorum Biceps brachii Sternocleidomastoid External oblique 1 2 3 4 5

11. Muscles of Facial Expression “It takes more muscles to frown than it does to smile.” More than 600 skeletal muscles in the body – 60 in the face! –40 used to frown –20 used to smile Smallest muscle is the stapedius, in the middle ear Largest - ??? Longest - ???

12. Muscles of Facial Expression (p.188) and Mastication (p.190) ***Epicranius has 2 parts: frontalis and occipitalis.

13. Muscles That Move the Head Add these muscles to your head drawing.