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3B Elevate Science
Topic 3 Human Body Systems Lesson 2 Integumentary, Muscular, Skeletal
| Question | Answer |
|---|---|
| What is the epidermis? | the most outer layer of he skin; a layer of dead cells |
| What is the dermis? | it lies immediately below the epidermis; it is much thicker than the epidermis |
| What is melanin? | it is one factor that determines skin color and hair color |
| What is the function of the Integumentary System? | it is for protection, touch and keeps the right temperature |
| What is the function of the sweat glands? | they produce sweat to cool the skin |
| What does the fat layer do? | It attaches skin to the body |
| What is skeletal muscle? | it is muscle tissue that is attached to the bones; helps with voluntary control |
| What is cardiac muscle? | it is involuntary muscle only found in the heart |
| What is smooth muscle? | it is muscle tissue in the walls of body organs such as the stomach and intestines; it controls involuntary movement |
| What does a tendon do? | it connects muscle to bone |
| What is a voluntary muscle? | a muscle that is under conscious control; ex: you decide to move your arm |
| What is an involuntary muscle? | a muscle that is not under conscious control; ex: your heart automatically pumps |
| What does a flexor do? | it bends part of the body; ex: bicep and hamstring |
| What does an extensor do? | it straightens part of your body; ex: triceps and quadriceps, blood vessels and the digestive tract, smooth muscle |
| What are the 5 major functions of the skeleton? | for shape and support; enables you to move; protects your internal organs; produces blood cells; strores some material until needed by your body |
| How does the skeleton help the body move? | muscles pull on the bones; bones give the muscles a structure to attach and pull on |
| What kind of movement does a hinge joint have? | forward and backwards movement |
| Where are hinge joints found in your body? | your knee and elbow |
| What kind of movement does a ball and socket joint have? | it swings in a circle |
| Where are ball and socket joints found in your body? | your shoulders and hips |
| What kind of movement does a pivot joint have? | one bone rotates around another |
| Where are pivot joints found in your body? | your neck |
| What kind of movement does a saddle joint have? | it allows movement in two directions |
| Where are saddle joints found in your body? | your thumb |
| What are ligaments? | strong connective tissue that the bones in movable joints are held together by |
| Describe compact bone. | there are no open spaces; it is the outer shell of the bone |
| Describe spongy bone. | it is strong, but lightweight becasue it has many small spaces within it |
| What is a cell? | life's basic unit of structure and function |
| What is tissue? | a group of cells that work together for the same purpose |
| What is an organ? | a group of tissues that work together for the same purpose |
| What is an organ system? | a group of organs that work together for the same purpose |
| What is an organism? | a group of organ systems that work together for the same purpose |
| What is nervous tissue? | tissue that is responsible for sending messages from the brain to the body |
| What is epithelial tissue? | tissue that covers and lines the organs of the body |
| What is connective tissue? | tissue that supports the body and connects its parts (blood, bones and fat) |
| What is muscle tissue? | tissue that allows movement by contracting and relaxing |
| What is the Circulatory System? | the body sytem responsible for carrying materials throughout the body |
| What is the Respiratory System? | the body system in which oxygen is brought into the body and carbon dioxide is released |
| What is the Digestive System? | the body system that takes in, breaks down and absorbs nutrients that are necessary for growth |
| What is mechanical digestion? | it includes grinding or chewing your food when you eat |
| What is chemical digestion? | it changes the composition of food by breaking it down- such as with stomach acids |
| What is the Excretory System? | the body system that helps rid the body of wastes, toxins and excess water |
| What are the major organs of the Excretory System? | major organs include the kidneys, ureters and bladder |
Created by:
carlsond
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