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Veins carry oxygenated blood to body parts.

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Important Questions on Human Body

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Excretory organs present in annelids
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The tissues that help in the movement of body are
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Which of the following tissue gives tensile strength against bending and swaying
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Nasal tracts are lined by 
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Observe the given diagram and read the following statements.

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(i) These are cells of collenchyma tissue.

(ii) At maturity these cells lose their nucleus and cytoplasm.

(iii) The cells are living and thick at their corners.

(iv) This tissue gives flexibility to plant parts.

Correct statements are:

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In animals, control and co-ordination are provided by which tissues?
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The xylem in plants are responsible for
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Name the structures that help in excretion in tapeworm, earthworm, cockroach and human beings.
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T-lymphocytes originate from
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Which of the following plant tip has quiescent centre
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Define excretion.
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Parenchyma, collenchyma and sclerenchyma are kinds of simple permanent tissues in plants. Which of the following statement is true for collenchyma?
A. Made up of dead cells
B. Have very little intercellular space
C. Cells are irregularly thickened at the corners
D. Cell wall contains lignin
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Give appropriate biological or technical terms for the following:

The relaxation phase of the heart.

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_____ is not an example of simple tissues.
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What is excretion? Name two excretory organs in humans.
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Explain the Haversian system of bone tissue.
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What is excretion? Name any two nitrogenous wastes products.
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Muscles contain special protein called 
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Sclerenchyma in plants is an example of simple permanent tissue that is comprised of two types of cells, sclereids and fibres. Why these cells are functionally important to the plants even after they die? Choose the correct alternative from the options given below.
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Choose the incorrect statements among the following.
A) The female sex organs of Angiosperms are called strobilus.
B) The fusion of motile male gamete with non-motile egg is called zooidogamy.
C) Some algae are in association with animals.
D) Archegonium is flank shaped male sex organ with single cell.