Human Digestive System

This is the correct option. Liver secretes bile juice that helps in the digestion of fats.

This is the correct option. The food enters the rumen, the largest and the first chamber. From here, the food enters reticulum that is the second chamber. From the mouth, the food is pushed directly into the third chamber called omasum. From omasum, the food enters abomasums, where digestive juices are mixed with semi-liquid food.

Melena refers to the passage of black, tarry stools, which usually indicates upper gastrointestinal bleeding where blood has been digested.

Haemochromatosis is a condition of excessive iron absorption leading to iron accumulation in organs, causing damage to the liver, heart, and pancreas. It can be hereditary (genetic) or acquired. The condition results from increased intestinal iron absorption and can lead to organ failure if untreated.

In plants, P-protein is involved in transport of organic compounds through phloem. Many proteins are stored to serve as reservoirs of amino acids and nitrogen. For instance, seeds of many plants store nutrient protein required for germination and growth of seedlings. Similarly, ovalbumin of egg white provides nourishment to developing bird embryo and casein of milk provides nourishment to mammalian infants. Ferritin protein of bacteria and plant and animal cells stores iron.

Bile is produced by the liver and stored in the gallbladder; it is essential for the emulsification and digestion of fats in the small intestine.

Colostrum is the first yellow coloured milk secreted by mammalian females. It is very healthy for the babies as it contains lots of antibodies along with normal milk content.

Pseudopodia helps both in injestion and movement.

This is the most abundant organic compound, most abundant biopolymer, and most abundant polysaccharide found on earth. Like those of amylose, molecules of cellulose are unbranched homopolymers of about ten to fifteen thousand D-glucose monomers which are, however, linked not by a, 1-4 but by P, 1-4 glycosidic bonds.

Endocytosis is the general process by which cells take in substances from the outside by engulfing them in a vesicle. Phagocytosis is a specific type of endocytosis often referred to as cell eating.

In unicellular organisms like Amoeba, food vacuoles are responsible for the digestion of food particles, mirroring the function of the digestive system in multicellular organisms.

Endocytosis is the process by which cells ingest external materials by engulfing them in a portion of the cell membrane.

Food is digested in the stomach to provide energy to body as fuel is burnt in the engine for generation of energy.

The Cori cycle, or lactic acid cycle, involves the transport of lactate from muscles to the liver, where it is converted back to glucose.