Notesale: Turn your study into money

Document Preview

Extracts from the notes are below, to see the PDF you'll receive please use the links above

---

Locomotion and Movement of Human
Body: Skeletal system explanation
Movement is one of the significant features of living beings
...
Streaming of
protoplasm in the unicellular organisms like Amoeba is a simple form
of movement
...
Human beings can move limbs, jaws, eyelids,
tongue, etc
...
Such voluntary movements are called locomotion
...
Locomotory structures need not be different from those
affecting other types of movements
...
Hydra can use its tentacles for capturing its prey
and also use them for locomotion
...
The above observations suggest
that movements and locomotion cannot be studied separately
...
Methods of locomotion
performed by animals vary with their habitats and the demand of the
situation
...

TYPES OF MOVEMENT:
Cells of the human body exhibit three main types of movements,
namely, amoeboid, ciliary and muscular
...
It is effected by pseudopodia formed by the streaming of

protoplasm (as in Amoeba)
...

Ciliary movement occurs in most of our internal tubular organs which
are lined by ciliated epithelium
...
Passage of
ova through the female reproductive tract is also facilitated by the
ciliary movement
...
The contractile property of muscles is
effectively used for locomotion and other movements by human
beings and majority of multicellular organisms
...

MUSCLE:
The cilia and flagella are the outgrowths of the cell membrane
...
Muscle is a specialised tissue
of mesodermal origin
...
They have special properties
like excitability, contractility, extensibility and elasticity
...
Based on their location,
three types of muscles are identified: (i) Skeletal (ii) Visceral and (iii)
Cardiac
...
They have a striped appearance under the microscope
and hence are called striated muscles
...
They are primarily involved in locomotory
actions and changes of body postures
...

They do not exhibit any striation and are smooth in appearance
...
Their
activities are not under the voluntary control of the nervous system
and are therefore known as involuntary muscles
...

As the name suggests, Cardiac

---