Lorica - body form protozoans, Biology

Assignment Help:

Lorica - body form Protozoans

It is a covering which unlike the theca fits loosely around the organism. It is a cup, bell or vase-like structure with one opening through which protrude the animal's appendages or the anterior part of the body. In solitary protozoans, the lorica may or may not possess a stalk. Cothumia which occur in couples, are contained in tectinous lorica and are stalked.

1616_Lorica - body form Protozoans.png

Figure: Cothurina

The protozoan nuclei are membrane bound, diverse in structure and method of division. Two basic types are found, vesicular with considerable\amount of nucleoplasm and the other compact. When more than one nucelus is present they are usually alike except in ciliates, where a massive compact macronucleus and one or more compact macronuclei are present. Cytoplasm can be distinguished as ectoplasm and endoplasm.

Ectoplasm appears transparent under light microscope and bears the base of the flagella or ciliia. The endoplasm appears granular and contains the nucleus and cytoplasmic organellps. The ectoplasm is more rigid and is in the gel state of a colloid while the endoplasm is in the sol or more fluid state.


Related Discussions:- Lorica - body form protozoans

How is the circulatory system of birds characterized, Q How is the circulat...

Q How is the circulatory system of birds characterized? Like every vertebrate, Birds, have a closed circulatory system. The heart is similar to the mammalian heart, having four

List host factor which play important role in implant, List host factor whi...

List host factor which play important role in implant survival. Host factors: a) Medical status of the patient b) Habits - Smoking - Parafunctional habits c) O

Value of biodiversity, Q. Value of biodiversity? Today, there is widesp...

Q. Value of biodiversity? Today, there is widespread concern for conservation of wild animals and plants. One might wonder why there is so much concern about protecting other s

Cooking loss and quality of products, Coo k in g loss and quality Yi...

Coo k in g loss and quality Yields and cooking losses of products are important as these determine acceptability and economics of products. Higher cooking losses increase th

importance of water in the body, Importance of water in the body Wa...

Importance of water in the body Water is the most essential constituent of life. Life cannot exist without water. About 90% of water is present in protoplasm  Water

How is arthropod reproduction characterized, Q. How is arthropod reproducti...

Q. How is arthropod reproduction characterized? Reproduction in beings of the phylum Arthropoda is sexual with larval stage in some insects and crustaceans (arachnids) present

Explain the basic concept of adulteration, Explain the Basic Concept of Adu...

Explain the Basic Concept of Adulteration? Food adulteration is the change in original composition and quality of food by adding, removing or substituting some ingredients of f

Explain about gastric ulcers, Q. Explain about Gastric ulcers? Gastric ...

Q. Explain about Gastric ulcers? Gastric ulcers occur in the lesser curvature of the antrum of stomach. A gastric ulcer appears to be caused by reflux of bile and factors that

Hypothermia-open heart surgery, Hypothermia :  Hypothermia reduces the met...

Hypothermia :  Hypothermia reduces the metabolic requirements of the body thereby reducing oxygen consumption. It also preserves high-energy phosphate stores of the body. At norma

State bioinert materials, State Bioinert materials Bioinert materials a...

State Bioinert materials Bioinert materials are chemically inert in the body and exhibit minimal chemical interaction with adjacent tissue such as titanium and alumina (Al 2 O

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd