Organsiation- Paper 1 Flashcards
What is a double circularity system?
Heart, blood vessels
1. Right, ventricle pumps, deoxygenated blood to the lungs to take oxygen blood returns to the heart.
2. Second one left ventricle pumps, oxygenated blood around all the other organs of the body blood gives up its oxygen at the body cells. Deoxygenated blood means to return to be pumped out of the lungs again.
Heart?
Organ keeps blood flowing wall of heart is a muscle tissue
What do Valves do?
Blood flows in the right direction prevent backwards
How does the heart pump blood? 4
- Blood flows into artria from vena cava and pulmonary vien
- Artery contract pushing blood in ventricle
3.ventricles contract. Forcing blood into the primary artery and aorta and out the heart. - Blood flows through organs through arteries returns to the veins.
Tissues and 1 example?
-group of SIMILAR cells work together carry a specific function.
-Can include MORE than one type of cell.
Example: muscular tissue contracts and move what it attached to
Organ?
An organ is a group of different tissues work together to form a particular function
Stomach, muscular tissues, move, stomach wall in churn food
Organ systems and one example?
A group of organs working together to perform a particular to function
.digestive system stomach, small intestine, digested, food breakdown, absorb food
Organism?
An organ system work together to make an organism
Rising temperatures in body?
Speed up beautiful reactions and an unwanted ones damage cells from two high temperatures
Catalyst?
Search things which increases speed reaction without being changed or used up within the reaction
Enzyme?
Large proteins made up of chains of amino acids are folded into unique shapes as enzymes
Where are enzymes produced and used generally? 2
1-Used in the digestive system different enzymes
2-catalyse break down food produced by specialise cells in glands and gut lining.
Salivary gland?
Produce amylase enzyme in saliva
Gullet?
Oesophagus
Livers?
Bile produced neutralises, stomach, acid and emulsifies fat
Gallbladder?
Bile are stored before it is released into the small intestine
Large intestine?
Excess water is absorbed from the food
Rectum?
Faeces are stored-> anus
Small intestine?
Produces protease amaylse and lipase enzyme to complete digestion. Digested food is absorbed out of the digestive system into the blood.
Pancreases?
Produces protease Amyalse lipase enzymes -> releases into small intestines
Stomach?
Churns food (muscular walls) produces protease enzyme pepsin Produces hydrochloric acid
1. Kill bacteria.
2. Give the right pH for proteins to work acidic.
What is the Epidermal and it’s function?
1-Waxy cuticle
2-reduce water loss by evaporation
Upper epidermal function? (2)
-Transparent light passes through to palisade layer
-waxy cuctile prevent water loss