Page 168 - Biology Form Two

Biology for Secondary Schools

Vaccination Ventricle
A procedure that is intended to trigger Each of the two lower chambers of the heart
a response by the immune system to a Villi
pathogen or a weakened form of it in order Finger-like projections found in the walls
to stimulate a long-term defence against of the ileum, which are important in the
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the pathogen food absorption process
Valves Vitamins
Flaps of tissues which prevent backward Complex organic micronutrients essential
flow of blood in veins and in the heart
for growth and protection against diseases
Vascular cambium WHO (World Health Organisation)
The tissue that divides to form new phloem An agency of the United Nations, concerned
and xylem
with improving public health and preventing
Vein or controlling diseases
A vessel that transports blood to the heart Xylem
from all parts of the body Tissue made up of xylem vessels and

Vena cava tracheids that transport water and minerals
The largest vein in the body which returns in vascular plants
blood to the heart

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