Fourth+Quarter+Assignments

(110/126) 4/5 Organ System Overview: (Lecture and Notes) 1. The human body can be divided into 11 organ systems. 2. The 11 organ systems work together and are not totally separate. 3. The organ systems of the body work together to provide body cells with oxygen and nutrients; plus remove wastes. 4. Organ systems are made up of organs such as the pancreas that produces both digestive and endocrine substances. 5. Organs consist of various tissues that work together to carry out a specific function. 6. A tissue is a collection of cells with a similar structure that work together at a particular function. 7. Organ systems are made of organs; organs are made of different tissues; and different tissues are made of different cell types. 8. Muscle, nervous, epithelial, and connective tissues are the four main types of tissues. 9. Muscle tissue is composed of cells that can contract. 10. Skeletal muscle is attached to bones and can be moved consciously. 11. The smooth muscles of the digestive organs and skin are not under conscious control. 12. Nervous tissue contains cells that receive and transmit messages in the form of electrical impulses. 13. The sending and receiving the messages throughout the body is done by cells called neurons. 14. External and internal changes are sensed by some nervous tissue. 15. Other nervous tissue interprets the information sensory organs. 16. Still other nervous tissue caused the body to respond to interpreted sensory information. 17. Epithelial tissue consists of layers of cells that line or cover all internal and external body surfaces. 18. Epithelial cells are tamely bound together and provide a barrier for internal and external surfaces. 19. Skin consists of a layer of dead, flat cells that protect the underlying layer of living epithelial cells. 20. Connective tissue binds, supports, and protects structures in the body. 21. Connective tissues include bone, cartilage, tendons, fat, and blood. 22. The cells of connective tissue are embedded in large amounts of an intercellular substance called a matrix. 23. A hard calcium containing matrix surrounds bone cells. 24. Cells in cartilage, tendons, and that's have a semisolid fibrous matrix. 25. Blood cells are suspended in a liquid matrix.