Biology Tissue Types and Systems
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This set of flashcards covers key concepts related to tissue types, their functions, and systemic functions within the body, as well as additional concepts in biology.
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28 Terms
What are the four main types of tissue?
Epithelial, connective, muscle, nervous.
What is the main function of epithelial tissue?
Protection, absorption, and secretion.
Why are epithelial cells tightly packed?
To form a protective barrier.
Where is epithelial tissue found?
Skin, intestines, alveoli.
How does epithelial tissue in the small intestine help absorption?
Microvilli increase surface area.
What is the main role of connective tissue?
Support, binding, transport.
Name four types of connective tissue.
Bone, blood, cartilage, fat.
Why is blood considered connective tissue?
It transports substances.
What is the function of muscle tissue?
Contraction and movement.
Name three types of muscle tissue.
Skeletal, smooth, cardiac.
What is the function of nervous tissue?
Transmit signals.
Where is nervous tissue found?
Brain, spinal cord, nerves.
What is the main function of the respiratory system?
Gas exchange.
What are alveoli?
Tiny air sacs for gas exchange.
What is the main function of the circulatory system?
Transport substances.
What do red blood cells do?
Carry oxygen.
Where does digestion begin?
Mouth.
Where are nutrients absorbed?
Small intestine.
What are the main functions of the musculoskeletal system?
Support, protection, movement.
What is a neuron?
A nerve cell that transmits signals.
Why is surface area important?
Increases absorption and diffusion.
Why are alveoli efficient?
Large surface area, thin walls.
Why do veins have valves?
Prevent backflow.
Why is the stomach acidic?
Break down food and kill bacteria.
Why do muscles work in pairs?
One contracts, one relaxes.
Why are reflexes fast?
They bypass the brain.
What happens at high altitude?
Less oxygen reduces performance.
Digestive System
Explain how the digestive system works.
Food enters the mouth where it is chewed and mixed with saliva. It moves down the esophagus to the stomach where acids and enzymes break it down. In the small intestine, nutrients are absorbed into the bloodstream through villi. The large intestine absorbs water and the remaining waste leaves the body.