cell specialisation and organisation

what do cells do to peform specific functions?

specialise

how does the cell become specialised?

every cell contains the genes it needs to develop

but only one of these genes are expressed. Different genes are switched on in each cell

what else except for the shape of the cell differs?

the number of organelles

What do WBC have a lot of ?

lysosomes

tissue

similar group of cells that peform a specific function

epithelial cells

line the surface of organs and provide a protective barrier

xylem does

transports water and mineral ions throughout plant and provide structure

organ

is a combination of tissues that are formed to form a specific function

Types of tissues and its functions in the stomach

• connective tissue- hold together tissues

• epithelium- protect stomach wall

leaf properties and functions

• xylem

• palisade mesophyl- photosynthesis

• epidermis- protect leaf and allow diffusion

• spongy mesophyl- gaseous diffusion

what tissue is capillaries made up of?

epithelial

digestive system

• digests and processes food. Made up of organs such as stomach , pancreas

respiratory system

• breathing and gas exchange. Trachea and lungs

circulatory system

pumps and circulates blood. Heart and veins