(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

What covers the surface of a plant?

Epidermis

What is the epidermis usually covered by and what is the role of it?

Waxy cuticle to reduce loss of water

Allows co2 and water vapour and oxygen to diffuse in and out

What is the epidermis

It is where stomata is present

Single layer of closely packed cells

What is the function of xylem tissue and how is it specialised?

What type of tissue is it?

Transports water and minerals through plants

Elongated dead cells - strengthened with lignin (waterproof) and provide structural support

A type of vascular tissue

What is the role of phlegm and how is it specialised?

Transport of organic nutrients from leaves + stems

Have columns of sieve tube cells separated by sieve plates

Type of vascular tissue