Page 166 - Biology Form Two

Biology for Secondary Schools

responsible for the clotting of blood. They A nutritional disorder caused by deficiency
are also called thrombocytes of vitamin D. It is manifested by bow legs

Predator Root hair
The animal that captures, kills, and feeds Thread-like extension of the epidermal
on another animal in a predation-prey cells of the roots which increases root
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mode of feeding surface area for absorption of water and
Prey minerals
An animal that is fed on by a predator Root pressure
Proteins The pressure that pushes water and dissolved
Organic compounds made of amino acids mineral salts up the plant

Pulmonary artery Ruminant
An artery that transports deoxygenated An animal that chews cud (food that is
blood from the heart to the lungs chewed, swallowed and then returned to
the mouth for further chewing, a process
Pulmonary circulation
Movement of blood between the heart and also called regurgitation). Ruminants have
the lungs a four-chambered stomach
Pulmonary vein Saccus entericus
A vein that transports oxygenated blood The alkaline secretion produced by glands
from the lungs to the heart in the wall of the duodenum. It is also
called intestinal juice.
Pulse rate
The number of times a person’s heart beats Saliva amylase
in one minute A digestive enzyme in the mouth that
catalyses the break down of cooked starch
Rectum
The last part of the large intestine that stores and changes it into maltose
faeces temporarily before they are passed out Saprophytism
A type of nutrition in which an organism
Reservoir
A place where anything is kept absorbs nutrients from dead organic matter.
It involves external digestion
Respiration
The process by which food substances are Semi-permeable membrane
burned inside the cells to produce energy A membrane that allows only certain
substances to pass through
Respiratory surface
A thin and moist epithelial surface through Sense organs
which oxygen can cross into the body and Groups of tissues that enable us to perceive
carbon dioxide can cross out of the body and respond to stimulus such as light,
smell, sound, taste and touch
Rhizoids
Root-like structures of fungi and other non- Sensitivity
vascular plants like mosses Ability to detect and respond to stimuli. It
is also referred to as irritability
Rickets
Septum

160 Student’s Book - Form Two

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