NCERT part 2 Flashcards
Many long, cylindrical fibres arranged in parallel array together form
Muscle
What plays an active role in the movements of the body?
Muscle
Each muscle is made up of long, cylindrical fibres arranged in parallel arrays. These fibres are composed of numerous fine details, called?
Myofibrils
What encloses several bundles of muscle fibres?
A sheath of tough connective tissue
Which muscle fibres taper at the ends?
Smooth
Fusiform in appearance, which muscles?
Smooth mucles
Why are smooth muscles named so?
No striations
What holds smooth muscles together?
Cell junctions
Smooth muscles are bundled in a?
Connective tissue sheath
Name a contractile tissue present in heart
Cardiac muscle
What makes cardiac cells stay together
Cell junctions fuse the Plasma membrane of the cells.
Communication junctions are?
Intercalated discs present at some fusion points (cell junctions fuse the PM of cells to keep them together) allow the cells to contact as a single unit.
Which cells make up more than half the volume of neural tissue in our body?
Neuroglial cells
Neural system is made of how many cells
Neurons (unit of neural system) and neuroglial cells (constitute the rest of the neural system, protect and support neurons)
Neuron’s endings are also known as?
Output zone
Our heart consists of how many tissues?
All four: Epithelial, Connective, Muscular, Neural
What do we observe when we study the complexity of organs and organ systems
A discernable trend, evolutionary trend.
Morphology is? Distinctions when plant, animals and microbes are taken in context.
Study of form or externally visible features.
Holds true for plants and microbes. (Precisely means this)
In case of animals, this refers to the external appearance of the organs or parts of body.
Anatomy refers to?
Study of morphology of internal organs of animals
