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Transport in the Earthworm

Transport in the Earthworm. and Grasshopper. Aim : How does transport occur in the earthworm and the grasshopper?. I. Transport in the Earthworm. A. Closed Circulatory System – blood is contained in closed vessels. The blood does not leave these vessels.

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Transport in the Earthworm

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  1. Transport in the Earthworm and Grasshopper

  2. Aim: How does transport occur in the earthworm and the grasshopper? I. Transport in the Earthworm A. Closed Circulatory System – blood is contained in closed vessels. The blood does not leave these vessels. 1. Its blood contains hemoglobin, a red pigment which helps transport oxygen.

  3. 2. Its dissolved digestive end products are carried in blood. 3. Blood vessels a. Dorsal blood vessel – large blood vessel that runs along the top of the earthworm. Brings blood forward towards the aortic arches. b. Ventral blood vessel – large blood vessel that runs along the bottom of the earthworm. Brings blood from the aortic arches to the rest of the body.

  4. c. Capillaries – microscopic blood vessels that bring blood to and from the cells. d. Aortic arches – 5 pairs of muscular pumps that force the blood throughout the earthworm.

  5. II. Transport in the Grasshopper A. Open Circulatory System – the blood is not always enclosed in blood vessels. 1. Blood only carries digestive end products, NOT oxygen. 2. Tubular heart – a long, dorsal blood vessel that helps pump the blood forward. Grasshopper’s body movements also help move blood.

  6. 3. Sinuses – open spaces in which blood collects and soaks into tissues.

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