Tap Root. Plants with a tap root system have a large dominant central root where other lateral roots sprout. These lateral roots are called secondary roots. Examples of plants with taproot system are: sugar beet, parsnip, carrots, radish, dandelion and beetroot.
The general term of it all is Cytology, which means the study of the cells. This in turn is split into smaller sciences like Cytophysiology (Study of cell physiology and anatomy), Ctyopathology (Study of diseases effects on cells), and Cytochemistry (study of cell biochemistry).
In the case of breathing, probably because we have gotten so used to it by now.
Urinary Bladder : holds urine
■muscular ducts that connect kidneys & bladder
Ureter :
■hollow saclike organ connect to kidney
■transport Urine by peristaltic action from kidney to bladder
Urethra :
transports urine to the bladder to outside of the body
■narrow duct that connects to bladder