UNIT 8 organization of life Flashcards
(21 cards)
What are ORGANELLES?
Small structures within cells that perform specific jobs
Examples include mitochondria and ribosomes.
What is the smallest unit of life?
CELL
What do CELLS carry out?
Basic life processes that allow the body to survive
What is a TISSUE?
A group of similar and connected cells that work together
Name the four main types of tissues in the human body.
- Epithelial tissue
- Connective tissue
- Muscle tissue
- Nervous tissue
What is Epithelial tissue?
Layers of tightly packed cells that line the surfaces of the body
What is Connective tissue?
Made up of many different types of cells that support other tissues
What are examples of specialized connective tissue?
- Tendons
- Cartilage
- Bone
- Blood
What is Muscle tissue?
Made up of bands of cells that contract to allow movement
What types of muscle tissue exist?
- Skeletal muscle
- Smooth muscle
- Cardiac muscle
What is Nervous tissue?
Made up of nerve cells that sense stimuli and transmit signals
What do groups of tissues form?
ORGANS
What are ORGANS?
Structures that consist of two or more types of tissues that work together
Give examples of human organs.
- Heart
- Lungs
- Kidneys
What is an ORGAN SYSTEM?
A group of organs that work together to perform a specific function
What do all organs in the digestive system do?
Work to take in, digest, and absorb nutrients in food
What is an ORGANISM?
One complete, individual living thing
How do organ systems contribute to an organism?
They work together to keep an organism stable and healthy
Fill in the blank: The heart is part of the _______ system.
circulatory
Fill in the blank: The lungs are part of the _______ system.
respiratory
True or False: All cells in an organism need nutrients and oxygen.
True
