Question

difine digestive system in human?Difine respiration​

Answer 1

Digestive system is a functioning in human body which helps in digesting food and provide nutrition to our body which are present in food.

it is one of the most important systems in our body because by the help of these systems we get energy to do our life time work and repair are damaged tissues.

Respiration is the movement of oxygen from outside environment to the cells within the tissues. Overall, it is a process by which living things produce energy from food. Respiration needs oxygen to perform.

Answer 2

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➟Digestion is the process of breaking down of larger food particles into smaller ones to be absorbed by the blood cells.

➟In case of human beings and higher animals, the process of digestion takes place at various locations.

➟When digestion takes place in the digestive tract it is known as extracellular digestion.

➟The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine—which includes the rectum—and anus.

➟Food enters the mouth and passes to the anus through the hollow organs of the GI tract. The liver, pancreas, and gallbladder are the solid organs of the digestive tract.

➟Accessory organs of the digestive system include the teeth, tongue, salivary glands, liver, gallbladder, and pancreas.

➟The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body.

➟Food passes through a long tube inside the body known as the alimentary canal or the gastrointestinal tract (GI tract).

➟The function of the digestive system is digestion and absorption. Digestion is the breakdown of food into small molecules, which are then absorbed into the body.

➟The digestive system is divided into two major parts:

The digestive tract (alimentary canal) is a continuous tube with two openings:

the mouth and the anus.

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➟Respiration is the process which releases energy from the breakdown of glucose.

➟Aerobic respiration takes place in the presence of oxygen. This type of respiration needs oxygen for it to occur so it is called aerobic respiration.

➟Glucose + Oxygen-------> Carbon dioxide + Water + Energy.

Mechanism of respiration:

✍Breathing or pulmonary ventilation: It involves both inhalation in which an adequate amount of oxygen is taken inside and exhalation involves removal of carbon dioxide with air.

✍External respiration: This is the exchange of oxygen to the blood and of carbon dioxide from blood to alveoli and is done due to their concentration gradient.

✍Transport O2 to tissue: Oxygen binds to haemoglobin and reaches to tissues.

✍Internal respiration:As the concentration of oxygen is less and carbon dioxide is more in number the haemoglobin release oxygen and is absorbed by the tissue.

✍Transport of CO2 from tissue:The carbon dioxide released by tissue transported in the form of bicarbonate, carbamino-haemoglobin and dissolved in the blood reaches to alveoli then diffuse from blood and released out.

hope it helps you:)