1 / 11

The Grasshopper: an insect

The Grasshopper: an insect. Being an insect means it has 6 legs. It is also called an ARTHROPOD, which literally means, jointed feet. Nutrition. A 1 way digestive tract Specialized mouthparts for cutting and tearing food

tarak
Download Presentation

The Grasshopper: an insect

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Grasshopper: an insect Being an insect means it has 6 legs. It is also called an ARTHROPOD, which literally means, jointed feet

  2. Nutrition • A 1 way digestive tract • Specialized mouthparts for cutting and tearing food • Both the salivary glands and gastric caeca secrete hydrolytic enzymes. What is their purpose? - to chemically digest (hydrolyize) the food

  3. The Grasshopper’s Digestive Tract Stomach Gizzard Intestines Crop Anus Esophagus Gastric Caece Salivary Glands Rectum Mandible Pharynx

  4. Transport The grasshopper has: • An internal OPEN CIRCULATORY SYSTEM: No network of vessels • A Tubular heart which pumps blood into the AORTA: A large aorta blood vessel which squirts blood into the… • SINUSES: large cavities where blood bathes cells. Blood re-enters the Aorta through a series ofvalves.

  5. Circulatory System The blood of a grasshopper does NOT contain hemoglobin! So it can’t carry oxygen. The grasshopper is basically hollow in side, with blood squirting everywhere, like a lemonade machine Tubular Heart Aorta Sinuses

  6. RESPIRATION • Since respiratory gases are not carried in the blood, they are carried by a system of tracheal tubes or tracheae. These open to the air through small openings called spiracles. These tubes lead to the moist membranes of the body cells • Air sacs pump air through the tracheae • Other than the spiracles, the grasshoppers body is dry and impermeable to liquids and gases. Is this beneficial considering their environment?

  7. Respiration Air sacs Trachea Spiracles

  8. Excretion • Carbon dioxide diffuses from body cells into body fluids, into tracheal tubes, out through the spiracles. • Water, mineral salts, URIC ACID CRYSTALS (its nitrogenous waste) accumulate in the malpighian tubules: the Excretory organs of the grasshopper • These wastes pass into the intestine, where most of the water is reabsorbed • Minerals, Uric acid crystals leave body with the digestive wastes.

  9. More Excretion • Uric acid crystals aren’t soluble in water • Malpighian tubules main function, then is to reabsorb water and excrete solid waste. Stomach Rectum Malpighian Tubules

  10. REGULATION The grasshopper has: • A central nervous system with peripheral nerves branching off • Highly developed sense receptors (antenna) Ganglion Brain Nerve Cord

  11. LOCOMOTION • Moves with the interaction of muscles with the EXOSKELETON (skeleton on the outside) • Exoskeleton made of CHITIN, a polysaccharide. • It is jointed to permit movement • It has 3 pairs of legs, 2 pairs of wings Jumpin Legs Outer Wings Walking legs

More Related