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3B Elevate Science

Topic 3 Human Body Systems Lesson 2 Integumentary, Muscular, Skeletal

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