Levels of structural organisation of the body

Question 1

Chemical level - what 3 atoms do they make?
what 3 combinations do these make?
These molecules combine to form what?

Answer 1

the body is made up of building blocks called atoms e.g. Carbon, hydrogen and oxygen - essential for maintaining life - e.g. by combining to form molecules like fats, proteins and carbohydrates - these molecules combine to form cells

Question 2

cellular level -
what do they combine to form?

Answer 2

cells are the basic structural and functional unit of the body. They all have specific functions e.g. nerve/blood cells - they combine to form tissues

Question 3

Tissue level

Answer 3

Groups of cells and materials. There are 4 tissue types which preform particular functions. Called epithelial. Muscular connectives and nervous tissues - two or more different types combine to form organs

Question 4

Organ level

Answer 4

Have a very specific function and recognizable shapes. e.g. heart, liver, stomach, lungs - a group of them combine to form systems

Question 5

organismic level

Answer 5

Is a living person

Question 6

system level

Answer 6

composed of related organs performing a particular function. e.g. digestive system has organs e.g. stomach, liber, pancreas, small and large intestine. - its function = break down and digest food

Question 7

Dense connective (fibrous) tissue definition

Answer 7

contains thick, densely packed fibres and fewer cells than loose connective tissue. It forms strong structure and there are different types of it

Question 8

Elastic connective tissue (yellow elastic tissue)
Description:
Location:
Function:

Answer 8

Description: has many freely branching elastic fibres; few cells and little matrix; elastic fibres five the tissue a yellowish colour
Location: lung, arteries walls, trachea, bronchial tubes
Function: elasticity for stretching and strength

Question 9

Dense regular connective tissue (white fibrous tissue)
Description:
Location:
Function:

Answer 9

Description: has mainly collagen fibres arranged in parallel bundles with cells in between the bundles; the matrix is a shiny white colour
Location: Tendons, ligaments, aponeuroses
Function: attachment

Question 10

Bone (osseous tissue) definition

Answer 10

Bone is an exceptionally hard connective tissue that protects and supports other organs in the body.

Question 11

Where do the bone cells sit?

Answer 11

in the lacunae (cavities) surrounded by layers of a very hard matrix - this has been strengthened by the inorganic salts e.g. calcium and phosphate - includes compact and cancellous bone