and Socket joint - The rounded end of one bone fits
into the cavity of the other bone. Such a joint allows
movement in all directions. [Shoulder and arm]
– head joins our neck at a pivot joint.
Joint – only allows back and forth movements.
joints – immovable joint [upper jaw and head]
– Additional parts of skeleton but not hard as bones.
– Required to make movement. Two muscles are needed
to move a bone. While one contracts the other expands.
Contracting bone moves a muscle in its direction and then
its paired muscle expands. When the other muscle contracts
the bone moves in the second direction.This causes
tissues are of multiple types like:
tissue: it is a protective tissue that covers all
parts of the body. It has no intercellular space. It
allows material to pass through it but only selective
materials. It has many types like squamous, ciliated,
columnar, tall etc depending on structure.
tissue: Blood, bones [made of calcium and
phosphorous compounds] and ligaments [join bones
together], cartilage [smoothens bone surfaces at joints],
tendons [connect muscles and bones] are types. Adipose
connective tissue stores fats between internal organs to
act as insulator.
[striated, unstriated and cardiac] and nervous tissues
[made of neurons that receive and conduct impulses] are
can only pull not push.
hair and mucus in our nose prevents dust from entering the
eats its way through the soil. Its body throws undigested
material that it eats;this makes the soil more fertile. It
breathes through its skin. Air present inside the water
and soil is used for breathing by the earthworms. Insects
have tracheas to breathe.
have hollow bones.
move with the help of a muscular foot.
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