Explain how `CO_2` is transported from metabolically active cells of human body to the organs from where it is released out into the atmosphere.

List and explain the three ways by which CO_2 is transported by blood in the human body.Support the answer with a suitable diagram.

Name two forms by which O_2 is transported by blood from the lungs to body tissues.

Name the cells that are released from the thymus gland. Mention how they help in immunity?

Where are B-cells and T-cells formed ? How do they differ from each other?

How is oxygen transported in the blood od earthworm from skin to body parts?

oxygenation of blood promotes the release of CO_2 from the blood in the lungs.

What hormones are secreted by the posterior pituitary gland?What function does each serve?Where are these hormones actually produced ?How are these hormones transported to the region from where they are released?

Nazima is fly fishing in a stream. The tip of her fishing rod is 1.8 m above the surface of the water and the fly at the end of the string rests on the water 3.6 m away and 2.4 m from a point directly under the tip of the rod. Assuming that her string (from the tip of her rod to the fly) is taut, how much string does she have out ? If she pulls in the string at the rate of 5 cm per second, what will the horizontal distance of the fly from her after 12 seconds ? .