a/b) Levels of organisation and Cell structure

What are organelles?

Tiny structures within cells.

What are cells?

Tiny building blocks that make up living organisms.

What are tissues?

A group of similar cells that work together to carry out a particular function.

What is an organ?

A group of different tissues that work together to perform a function.

What is an organ system?

Organs that work together to form an organ system.

Describe the structure of a nucleus?

A large, oval organelle surrounded by its own membrane.

Describe the structure of a cytoplasm?

A jelly-like fluid that fills the cell.

Describe the structure of a cell membrane?

Thin partially permeable barrier around cell.

Describe the structure of a cell walls?

Rigid layer outside cell membrane, made of cellulose in plants.

Describe the structure of a mitochondira?

Small, oval shaped structure with a double membrane.

Describe the structure of a chloroplast?

Disc-shaped structure containing chlorophyll.

Describe the structure of a vacuole?

Large, fluid-filled sac.

Function of nucleus?

Contains genetic materials which controls cell’s activities.

Function of cytoplasm?

Site of cell’s chemical reactions. Contains enzymes controlling these reactions.

Function of cell membrane?

Controls which substances go in and out of cell.

Function of cell walls made?

Supports and strengthens cell.

Function of mitochondria?

Site of aerobic respiration.

Function of chloroplasts?

Site of photosynthesis, chlorophyll captures light energy to make glucose.

Function of ribosomes?

Make proteins.

Function of vacuoles?

Contains cell soap and supports cell.