Interaction of the D.system with the other Body system

• 4 main system that interacts with other body systems


  integumentary system, circulatory system, excretory system, and

  nervous system
• Integumentary System


  -Calcium absorption is aided by vitamin D.

  -Human skin is abundant with receptors which trigger Vitamin D synthesis upon exposure to sunlight.

  -skin is kept healthy and protected by the fats and oils absorbed in the small intestine.

  -aids the digestive system in acquiring vitamin D
• Vitamin D


  -Vitamin D increases the rate of protein synthesis in muscle fibers.

  -Vitamin D is also linked to weight loss through the fat burning has also been found.
• Human skin


  -plays a vital role in the absorption of calcium and the synthesis of

  proteins.
• Circulatory System


  -The absorbed nutrients are transported to other organs via the circulatory system.

  -Nutrients enter the bloodstream through the actions of villi and microvilli.

  -About 30 percent of blood pumped by the heart goes to the digestive system.

  - It also carries the chemical signals or hormones from which regulate digestion.

  -transports waste materials into the kidneys

  -supplies the digestive organs with oxygenated

  -transports glucose into the liver for storage

  -transports amino acids for tissue repair

  -transport fats for energy source or storage
• Excretory System


  -The liver breaks down amino acids and fats and by also removes the wastes from the blood.

  -The blood is eventually filtered by the kidneys for excretion.
• Nervous System


  -Digestive system provides the molecules for synthesis of the

  neurotransmitters.

  -The absorbed amino acids are essential building blocks of the

  neurotransmitters.

  -aids in regulating digestion
• Chemical Regulators


  Hormone regulators are chemical messengers or hormones

  that regulate the digestive activity. Several hormones are involved in releasing the proper substances to promote proper digestion.
• Gastrin


  stimulates the production of hydrochloric acid.
• Secretin


  from the pancreas signals the production of

  digestive juices like pepsin.
• Cholecystokinin


  signals the production of pancreatic

  juices that helps digestion in the small intestine.
• Nerve Regulators


  Extrinsic nerve regulators are chemical messengers from

  the brain and spinal cord.
• Adrenaline


  relaxes the stomach and intestinal muscles

  of the stomach; decreases blood flow into these organs.
• Intrinsic nerve regulators


  these are the networks in the walls of the esophagus, stomach, and intestines.

  • They are stimulated to release different enzymes as food

  enters these organs.

  • These enzymes speed up or delay the movement of food

  thus, also controlling food processing.
• General Function of Digestive system

  to break down food and extract nutrients for use by the other body systems.