What are the three distinct types of blood vessels? Describe each in few sentences?
I want to help you achieve amazing GCSE results!
Arteries - carry high pressure blood away from the heart. Have thick walls and a small lumen in relation to the thickness of their walls. Veins - carry lower pressure blood towards the heart. They have thin walls and a wide lumen in relation to the thickness of their walls. They also have valves to prevent the back flow of blood. Capillaries - have one cell thick walls to allow substances to diffuse in and out of the blood. Their function is substance exchange, removing waste products from cells and supplying them with glucose, oxygen, mineral ions etc.
Josh also answered
Asked in Biology 🌱
Asked by Phoebe-LilyBiology 🌱
What cell opens and closes the stomata?
The stomata itself is not a cell type but rather a pore. The size of the stomata and whether it is opened or closed is controlled through guard cell...
Asked by MichealBiology 🌱
Have plants been subject to evolution just like animals?
Yes. There is an extensive fossil record of plant evolution. David Attenborough himself actually discovered an important plant fossil in Charnwood i...
Asked by BireannaBiology 🌱
What different things do girls experience as a teen what a boy doesn’t ?
Are you asking this question from the perspective of biology, or sociology? I ask because biologically, the changes are pretty clear. For example, g...
Asked by VaishnaviBiology 🌱
What is respiration?
Respiration in the scientific context is when glucose is broken down in the mitochondria. This process uses oxygen, and results in carbon dioxide an...
Asked by RichardBiology 🌱
How is urine produced in the kidneys and nephrons?
First your blood is forced to enter the bowman’s capsule, where the high pressure forces all molecules that are small enough through the filter into...
Asked by SarahBiology 🌱
How have plants and animals adapted in the savanna ecosystem?
In the Savannah, there are several common adaptations. In animals, you often find sandy coloured fur or patterned fur for camouflage. Big ears to al...
Asked by MaxBiology 🌱
What is the difference between a homologous chromosome and a tetrad?
Homologous chromosomes are the pairs of chromosomes you have in (virtually) all of your cells. You get one chromosome of each pair from each parent....
Asked by WajeehaBiology 🌱
What kinds of work experience is there for aspiring Paediatricians? Or where should I get work exper...
I think something else worth noting is that universities are aware of how difficult it can be to get work experience at a hospital so if you are una...
Asked by MaxBiology 🌱
How is respiration in plants different from that in animals?
Aerobic respiration in plants and animals is largely the same as they occur in mitochondria which can be found in both plants and animal cells. The ...
Find me a tutor
We take your privacy seriously. View our policy.
You may get a call in as little as five minutes, but definitely within 24 hours!