Ques. No. 4 Functions of Lymph
(t) Lymph is involved in transportation of substances
where blood vessels do not reach.
(h) Lymph carries digested and absorbed fat from
intestine and drains excess fluid from extracellular
space back into the blood.
Checkl oint 02
I Suggest a suitable reason for the heart having four separate
chambers.
2 Valves are present in between the auricles and ventricles of the
heart. Give one reason.
3 Name an animal having two-chambered heart.
4 Name the instrument used to measure blood pressure.
5 What is the colour of lymphatic vessels?
Transportation in Plants
Plants lack a regular circulatory system like animals have
we all know that plants prepare their food from C02 and
water in their leaves. The other materials present in plant
body like nitrogen, phosphorus and minerals are taken
directly from the soil. The conduction of some materials
to short distances occurs through diffusion while for
longer distances a need of proper transportation system
arises.
Therefore, . two pathways have developed in plants
independently which comprise of
lem tissues
continUou
reaches all
the soil a'
concentrat
pressure).
The wate
difference,
is a steady
that create
Another s
water fron
The water
water fron
molecules
from the x
Transpil
Loss of wa
the plant i:
stomata.
It has follo
(z) It h.
(iil) It
(iv) It