NCERT Class 9 Science Solutions: Chapter 6 – Tissues Part 3

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Question 8:

Q. Differentiate between striated, unstriated and cardiac muscles on the basis of their structure and site/location in the body.

Answer:

Striated, Unstriated and Cardiac muscles are three types of muscle tissues. Their different characteristics are as follows:

Q_8_Table_showing_Difference_Between_Three_Types_Of_Muscle_Tissues.

Character

Striated Muscles

Unstriated Muscles

Cardiac Muscles

1. Shape of cells

Cells are long cylindrical,

non-tapering and unbranched

Cells are long with tapering ends (spindle shape) and unbranched.

Cells are non-tapering, cylindrical and branched.

2. Nucleus

Many nuclei (multinucleated) which are situated towards the periphery of muscle fibre.

The cells have only one nucleus (uni-nucleated) situated in the center.

Each cell contains one or two nuclei situated in the center.

3. Striation

Transverse alternate light and dark bands present.

Striations or strips are absent.

Cells have faint striations.

4. Mode of Contraction

Voluntary contract rapidly but soon undergo fatigue.

Involuntarily not at our will. Contract comparatively slow but do not fatigue.

Involuntary, rhythmically contract and relax throughout life without fatigue under normal conditions.

5. Example of location

Hands, legs and other skeletal muscles.

Stomach wall, intestine, ureter, bronchi etc.

Present in heart.

Question 9:

Q. Draw a labelled diagram of neuron.

Answer:

Q 9 Image Showing Neurons.

Q 9 Image Showing Neurons

Loading image

Question 10:

Name of following

Q. (a) Tissue that forms inner lining of our mouth.

Answer:

Squamous epithelium

Q. (b) Tissue that connects muscle to bone in humans.

Answer:

Tendon

Q. (c) Tissue that transports food in plants.

Answer:

Phloem

Q. (d) Tissue that stores fat in our body.

Answer:

Adipose tissue

Q. (e) Connective tissue with a fluid matrix.

Answer:

Blood

Q. (f) Tissue present in brain.

Answer:

Nervous tissue.