On the right side of the heart, the right atrium and ventricle work to pump oxygen-poor blood to the lungs.
On the left side, the left atrium and ventricle combine to pump oxygenated blood to the body.
The heart consists of four chambers in which blood flows.
Blood enters the right atrium and passes through the right ventricle.
The right ventricle pumps the blood to the lungs where it becomes oxygenated.
The study of functions and activities of organisms and their parts is known as. Physiology.
In earthworms, the skin serves as the organ of respiration.
This type of respiration is called cutaneous respiration.
The skin is thin, transparent, moist and richly supplied with blood capillaries.
In fish, ammonia is the chief excretory waste.
Fish excrete ammonia directly into the water through their gills.
Ammonia is toxic, but since fish live in water it gets diluted quickly, making it safe for excretion in this form.
Bryophytes such as mosses and algae are non-vascular plants.
They do not possess true roots, stems and leaves.
Xylem and phloem are absent. Bryophytes include liverworts, hornworts and mosses.
During infection, fungi typically penetrate plant tissues through Stomata
Fungi often enter plant tissues through natural openings like stomata, which are small pores on the surface of leaves.
Kashmir Orphans Relief Trust (KORT) was founded by Chaudhry Muhammad Akhtar in 2005
The organization was established in response to the devastating earthquake that hit Kashmir in October 2005
"Call a spade a spade" means to speak honestly and directly about something, even if it is uncomfortable or blunt.
This aligns well with the idea of being truthful.
Autumn leaves appear red and yellow because carotenoids are revealed.
This happens when chlorophyll breaks down in response to less sunlight.
Shown is a colour photograph of bright red and yellow flowers with green stems and leaves.
Endocytosis is the process by which cells engulf bulk material from their external environment by forming a vesicle around it.
This is a key mechanism for taking in large molecules or particles that cannot pass through the cell membrane by diffusion.