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Holozoic nutrition is a method of nutrition that involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it.
This nutrition involves:
1 Ingestion: Taking in complex organic food through mouth opening
2 Digestion: Change of complex food into simple form by action of enzymes.
3 Absorption: Passing of simple, soluble nutrients through blood or lymph.
4 Assimilation: Utilization of absorbed food for various metabolic processes. 5 Egestion: Expelling out the undigested food.

Tegument is a term in helminthology for the outer body covering of members of the phylum Platyhelminthes.
The name is derived from a Latin word tegumentum or tegere, meaning “to cover”.
It is characteristic of flatworms including the broad groups of tapeworms and flukes.

Holozoic nutrition is a method of nutrition.
It involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it.
It includes taking in the complex substances and converting them into simpler forms.
Example: proteins can be broken into amino acids.

Chemotrophs are a class of organisms that obtain their energy through the oxidation of inorganic molecules, such as iron and magnesium.
The most common type of chemotrophic organisms are prokaryotic and include both bacteria and fungi.
All of these organisms require carbon to survive and reproduce.

Digested food molecules are absorbed in the small intestine.
This means that they pass through the wall of the small intestine and into the bloodstream.
Once there, the digested food molecules are carried around the body to where they are needed.

Chromatin is a complex of DNA and protein found in eukaryotic cells.
The primary function is to package long DNA molecules into more compact, denser structures.
This prevents the strands from becoming tangled.
Also plays important roles in reinforcing the DNA during cell division, preventing DNA damage, and regulating gene expression and DNA replication.

Cells can be broadly grouped into two different types: cells found in prokaryotes and cells found in eukaryotes.
Prokaryotes tend to be single-celled and lack a membrane-bound nucleus and other membrane-surrounded structures called organelles..
Eukaryotes can be single-celled or multicellular.
Unlike prokaryotic cells, eukaryotic cells have a nucleus and other organelles.

The three dimensional structure of the complete DNA molecule was officially discovered by James D. Watson and Francis Crick in 1953.
This is much like what a strand of DNA looks like and the structure is called a double helix.
DNA is essentially made of sugar, phosphate and bases, bonded together by hydrogen.

Holozoic nutrition is a method of nutrition that involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it.
It includes taking in the complex substances and converting them into simpler forms and this nutrition involves:
1 Ingestion: Taking in complex organic food through mouth opening 2 Digestion: Change of complex food into simple form by action of enzymes.
3 Absorption: Passing of simple, soluble nutrients through blood or lymph.
4 Assimilation: Utilization of absorbed food for various metabolic processes. 5 Egestion: Expelling out the undigested food.

Leeches are segmented parasitic or predatory worms.
It comprise the subclass Hirudinea within the phylum Annelida.
They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular, segmented bodies that can lengthen and contract.

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