1. Female mammals have mammary glands and produce milk to feed their babies. ... Endothermic, tetrapod vertebrates that lay amniotic eggs and have mammary glands and hair or fur. Once the mother gives birth, the glands become active and start producing milk. Some of them don’t even have nipples. This milk provides young with much-needed proteins, sugars, fats, vitamins, and salts. Mammals have mammary glands which are absent in birds and reptiles. See image under Characteristic #3. Echidnas have mammary glands, and their young are nourished by their own milk, hence, mammal. These glands are found within the breasts of the females of these species. Marsupials have a pouch in which their immature young develop. This is the rich, fatty food source given to embryos. All the mammals in the world have Mammary Glands. Mammals give birth to live young, and they have mammary glands to feed their babies. Milk-producing mammary glands; Mammals are also endothermic. Also, echidnas have hair, which is exclusive to mammals, - two types of hair in fact, both body fur and spines. Monotremes are egg-laying mammals. But the word "mammal" refers to mammary glands, and the ability of a mammal mother to nourish young with milk produced by her own body. Three middle ear bones distinguish mammals from members of the classes of birds and reptiles. With reptiles, the females do not have these glands, do not produce milk, and most abandon the babies after they have hatched or sometimes after laying the eggs. Monotremes- platypus and spiny echidna. Mammalsvs Reptile Mammal and reptile have inhabited the earth for millions of years now. 2. Like birds, monotremes have a cloaca, a chamber at the end of the digestive tract for feces, excretory wastes, and sex cells. Most reptiles reproduce __ Yolk. As the rattlesnakes belong to the class Reptilia, they don’t have any mammary gland and thus cannot produce milk. The egg shell chemistry has to change so that it develops into a soft amniotic sac rather than a hard shell. Mammals and reptiles are both oxygen-breathing vertebrates that need nourishment for living. The mother reptile has to grow mammary glands and nipples. Characteristic #2. Reptiles (Late Latin for creeping or crawling) do not have an aquatic larval stage, and in this way are unlike amphibians. The body of mammals is covered by hairs, while the body of reptiles is covered with scales. Unlike other vertebrates, mammals nurse their young with milk produced by mammary glands, which are modified and enlarged sweat glands consisting of ducts and glandular tissues that secrete milk through nipples. Reptiles do not have mammary glands and are incapable of nursing their young in the same fashion as mammals. Not all mammals have nipples, however. Lacation. Gland in female mammals that produces milk for offspring. Cow showing her mammary glands, swollen full of milk. No. (All mammals have mammary glands, though not all mammals have breasts. But we’ll get to that.) Reptiles and fish have teeth that are all basically the same, though they can vary in size throughout the mouth. The mother and baby both have to know instinctively what to do with those nipples as soon as the baby is born. Mammals have a high metabolic rate; on the other hand, reptiles have a low metabolic rate. Mammary glands. Reptiles nurse or feed their offspring by hunting or stalking food. This all has to happen by chance at the same time. Most reptiles are oviparous, ... Marine snakes have flattened tails ... Mammals (from Latin for breast) are characterised by the presence of mammary glands which in females produce milk for feeding (nursing) their young. Other Differences. A region of the brain, called neocortex, is found only in mammals and cannot be seen in members of other two classes. Sexually. 3. Reptiles have a _____ heart. Conclusion.
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