Transport in animals Flashcards
What are the different types of circulatory systems?
-Open
-Closed
-Double
-Single
What is the need for transport systems in multicellular animals ?
Multicellular organisms have a small surface area to volume ratio. They need transport systems to be able to get all of the substances that cells need to the correct place.
What is the difference between a double and single circulatory system?
Double circulatory systems goes through the heart twice,
In double BP is high
Double is advantageous animals because everything happens faster EG: more active at respiring tissues
Single can be found in a fish
What is the difference between an open and closed circulatory system?
In open circulation, the blood is not enclosed in the blood vessels
The structure and function of an artery?
blood vessels that distribute oxygen-rich blood to your entire body
-Thin Lumen
-Thick smooth muscle
-Elastic fibres=pressure generated would burst the artery
-Endothelium
-tunica externa=connective tissue
The structure and function of an arteriole ?
connectors between your arteries and capillaries. They control your blood pressure and blood flow throughout your body
The structure and function of capillaries?
Capillaries are the smallest blood vessels in the body and are responsible for the exchange of oxygen, nutrients, and waste products between the blood and the cells
-Short diffusion pathway
-One cell thick
-Steep concentration gradient
-Endothelial cells
-Flattened-2D
-Has holes
The structure and function of venules?
moving blood that contains waste and lacks oxygen from your capillaries to your veins
The structure and function of veins?
collect oxygen-poor blood throughout your body and carry it back to your heart.
HPB to LBP blood vessels
Arteries
arterioles
capillaries
venules
veins
