Dolphins

Dolphins are classic example of streamlining. The body is sleek and smooth. supra the focal ratio jaw is a large mass of plunk and oil containing tissue. The anterior appendages contain the skeletal remnants of five digits that hurl the flippers. The hind appendages are virtually absent and consist of a pair of small pelvic bones. The dorsal fin is form from subcutaneous dermal tissue and is not movable by muscle action. The cardal or tail fin is also first dermal in origin. The main thrust comes from vertical shaking of the tail and flukes.

Dolphins are extremely and almost constantly birdcall that is capable of generating sounds. Each sound comprises a broad reach of frequencies including many in the ultrasonic range. The clicks are apply as a form of sonar that enable the dolphin to taint obstacle other dolphins, fish or even diminutive bits of matter in the water. Dolphins female genital organ deliver an acoustic assault to kill small prey. Deeper in the respiratory system they can produce a high pitch whistle used to communicate a particular emotional state or denotes alarm or sexual excitement Copulation ordinarily occurs during the spring months with the male-female pair exhibiting courtship for some time earlier to the copulation.



Gestation period in species is between 11 to 12 months, after which a single calf is produced. Delivery is normally tail first and after births the calf follows it mothers closely and suck takes place. The dolphins two mammary gland opens into sacs either side of the anal opening, and the calfs breakfast into the sacs. The nipple is grasped between the upper jaw the tongue, muscular contractions by the mother literally blue jet milk into the calfs mouth.         

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