Hour 4 Cephalopods

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Hour 4 Cephalopods by Mind Map: Hour 4 Cephalopods

1. Feeding/Digestion

1.1. Feeding: shrimp, small fish, small crustatians

1.2. Octopus Feeding: worms and other cephalopods

1.3. Digestion: digestive tract

2. Senses/Response

2.1. eyes

2.1.1. tentacles skin/shell highly developed eyes but poor lens

3. Movement

3.1. use suction cups on their arms/legs to stick on to the sea floor or rocks, swimming, push themselves, move around and grab food.

3.2. Jet Propulsion - a method use to swim fast

3.2.1. -water taken into mantle cavity by expansion of the mantle and shoot out from the hyponome

3.3. fins also provide balance and steering

4. Anatomy

4.1. Head-like skin structure called the Mantle which takes up most of the body Eyes Mouth Arms and tentacles - arms are for holding food and tentacles are longer for catching it; tentacles in squid and Octopie also have poison to catch their prey with. Parrot-like Beaks for biting into food. Radula for cutting up food Stomach Gills - filtering water for oxygen to breathe Internal shell for structure Heart Gonad Siphon - intake and outake of water Brain Ink sac - specialized for escape and defense, as well as a weapon to blind predators Cuttlefish have a Cuttlebone; inner shell Kidney Anus - for excretion Crop Squid and Octopie have poison glands.

5. Reproduction/Life Cycle

5.1. a short life span some have 3 to 15 months. All hatch from eggs most in 3-5 months. They all lay eggs individually. They can all lay up to 1, 000 eggs at a time.

6. Circulation

6.1. Squids have a closed circulatory system and they use hemocyanin, a copper-containing protein, rather than hemoglobin, to transport oxygen.

6.2. Blood is colorless when deoxygenated and turns blue when exposed to air. Squid and Octopus have blue blood.

6.3. A single systemic heart pumps the oxygenated blood through the rest of the body.

7. Respiration

7.1. Have 2 gills that are used for gas exchange

7.2. the gills are supporeted by a skeleton of robust fibrous proteins