(j) the organisation of cells into tissues organs and organ systems

What is tissue made up from?

Collection of differentiated cells that have a specialised function or functions

What are the 4 types of tissue

Nervous tissue

support transmission of electrical impulses

Epithelial tissue

*adapted to cover body surfaces internal + external

Muscle tissue

• adapted to contract*

Connective tissue

• hold other tissues together or as transport medium

What are specialised animal cells

Squamous epithelium

Ciliated epithelium

Cartilage

Muscle

What is squamous epithelium made of?

Squamous epithelial cells

What kind of appearance does squamous epithelium have?

Flat appearance

Thin

One cell thick

What is squamous epithelium esssential for?

During a rapid diffusion across surface

What does squamous epithelium form?

Forms the lining of the lungs

Oxygen diffusion

What is ciliated epithelium

Hair like structures (cilia)

What does ciliated epithelium line?

Lines the trachea causing mucus to be swept away from lungs

What is cartilage and where is it found? What fibres does it contain?

Connective tissue found in outer ear nose and ends of bones

Contains fibres of the proteins elastin and collagen

What is cartilage used for?

Prevents ends of bone rubbbing together

Many fish have whole skeleton made of cartilage not bone

What does muscle need to be able to do?

Needs to contract to move bones then move body

What are the different muscle fibres

Skeletal muscle fibre that is attached to the bonee

Contains Mycrofibrils which have contractile proteins