The accumulation of excess fluid in tissue space is called

In the elderly,the heart has to pump blood with more force due to.......

Dropsy means

Thickening of arteries due to cholesterol deposition is known as:

Briefly describe the following (Any four):
$(a)$ Anaemia $(b)$ Angina Pectoris $(c)$ Atherosclerosis $(d)$ Hypertension $(e)$ Heart failure $(f)$ Erythroblastosis foetalis

Provide the definitions/explanations for the following terms:
$(1)$ Thrombus
$(2)$ Embolus