NCERT Class 9 Science Solutions: Chapter 6 – Tissues Part 3 (For CBSE, ICSE, IAS, NET, NRA 2022)

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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
CharacterStriated MusclesUnstriated MusclesCardiac Muscles
1. Shape of cellsCells 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. NucleusMany 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. StriationTransverse alternate light and dark bands present.Striations or strips are absent.Cells have faint striations.
4. Mode of ContractionVoluntary 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 locationHands, 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

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.

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