Digestive System, Chordates, Parasites, Physiology

Basic Definition about Digestive System, Chordates, Parasites, Physiology and Kingdom of living organisms

Explain the digestive system?

The organs perform the function of breakdown of complex food into simple substances are called digestive system. These organs are:

Alimentary canal

Five parts of alimentary canal:

• Mouth
• Buccal cavity (upper & lower jaws) and Tongue
• Pharynx
• Oesophaygus
• Stomach

Intestine (small & large).

These parts are exclusive for completing digestion Process and convertion and absorbtion the nutrients.

Digestive glands

The following three parts of digestive glands are:

• Liver
• Pancreas
• Anus

Define main basic characters of chordates?

Chordates have some basic characters. These are:

• Notochord
• Nerve cord
• Pharyngeal gill slits
• They are found in all chordates during their embryonic period. After in adult life they modified or lost.

Give explanation of parasites?

We can’t differentiate the parasites into animals or plants. They take their food from other organisms. They may be different shapes and color like amoeba, paramecium, euglena, and chlamydomonas etc.

Explain physiology?

Physiology means ‘study of different parts of living things. Like study of heart, brain, liver, stomach and so on.

Name the five kingdoms of living organisms.

Kingdom prokaryotes (like viruses & bacteria)
Kingdom protoctista. These are (yeast, euglena & chlamydomonas).
Kingdom fungi for example mushroom,penicillin
Kingdom plantae its example is brassica
Kingdom Animalia (we study vertebrates and invertebrates in this kind of kingdom).