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Section 32
Vocab!!!
| Question | Answer |
|---|---|
| is the outer superficial layer of skin. | epidermis |
| is a protein which waterproofs and protects the cells and tissues that lie underneath. | keratin |
| is a pigment that absorbs light energy, which protects deeper cells from the damaging effects of ultraviolet rays of sun light. | melanin |
| is the second layer of the skin, beneath the epidermis. | dermis |
| are hair cells grow out of narrow cavities in the dermis. | hair follicles |
| lubricate skin and hair. | sebaceous gland |
| includes the skull, the verbal column, the ribs, and the sternum. | axial skeleton |
| includes the bones, arms, hands, hips, legs, and feet. | appendicular skeleton |
| is dense and strong; it provides strength and protection. | compact bone |
| living bone cells. | osteocytes |
| is less dense and has many cavities that contain bone marrow. | spongy bone |
| is found in the numerous bone of the arm, the femur bone of the leg, the sternum of the ribs, the vertebrae, and the pelvis. | red bone marrow |
| is found in many other bones, consists of stored fat. | yellow bone marrow |
| are cells in fetal cartilage develop into bone-forming cells. | osteoblasts |
| is the formation of bone from osteoblasts. | ossification |
| breaks down cells, which are then replaced by new bone tissue. | osteoclasts |
| are tough bands of connective tissue that attach one bone to another. | ligaments |
| is called involuntary muscle because it cannot be controlled consciously. | smooth muscle |
| cannot be controlled consciously. | involuntary muscle |
| is the involuntary muscle present only in the heart. | cardiac muscle |
| are muscles attached to bones by tendons and when tightened, or contracted, cause movement. | skeletal muscle |
| consciously controlled to move bones. | voluntary muscle |
| are tough bands of connective tissue, connect muscles to bones. | tendons |
| are muscle fibers consists of many smaller units. | myofibrils |
| are protein filaments. | myosin and actin |
| is the functional unit of a muscle and the part of the muscle that contracts . | sarcomere |
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elegaspi203
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