what is a meaning of mamals?

Answer 1

The term mammal has come form mamme. It means mammary gland. All mammals have hair, mammary gland, heterodont, thecodont, diphyodont dentition, seven cervical verterbrae, diaphragm, enucleated RBC. They are viviparous except for monotremes. Marusupials give birth to embryos that develop in the marsupium.

Answer 2

The mammals are the class of vertebrate animals characterized by the production of milk in females for the nourishment of young, from mammary glands present on most species and specialized skin glands in monotremes that seep or ooze milk; the presence of hair or fur; specialized teeth; three minute bones within the ear; the presence of a neocortex region in the brain; and endothermic or "warm-blooded" bodies, and, in most cases, the existence of a placenta in the ontogeny. The brain regulates endothermic and circulatory systems, including a four-chambered heart. Mammals encompass some 5,500 species (including humans), distributed in about 1,200 genera, 152 families and up to 46 orders, though this varies with the classification scheme.

Phylogenetically, Mammalia is defined as all descendants of the most recent common ancestor of monotremes (e.g., echidnas and platypuses) and therian mammals (marsupials and placentals).

Living mammal species are easily identified by the fact that the females have mammary glands which produce milk.

But other features are required when classsifying fossils, because mammary glands and most of the other features listed above are not visible in fossils. The evolution of mammals from reptiles was a gradual process which took about 70 million years, from the beginning of the mid-Permian to the mid-Jurassic, and by the beginning of the mid-Triassic there were many species which looked very much like mammals.

Paleontologists therefore use as the distinguishing feature one that is shared by all living mammals (including monotremes) but is not present in any of the early Triassic mammal-like reptiles - mammals use for hearing two bones which all reptiles use for eating. The earliest reptiles had a jaw joint composed of the articular (a small bone at the back of the lower jaw) and the quadrate (a small bone at the back of the upper jaw). All non-mammalian reptiles use this system, including lizards, crocodilians, dinosaurs (and their descendants the birds) and mammal-like reptiles. But mammals have a different jaw joint, composed only of the dentary (the lower jaw bone which carries the teeth) and the squamosal (another small skull bone) - the word "only" is important here, as some late mammal-like reptiles had both types of jaw joint. And in mammals the old quadrate and articular bones have become the incus and malleus bones in the middle ear. Note: "non-mammalian reptiles" above implies that mammals are a sub-group of reptiles, and that is exactly what cladistics says they are.

Mammals also have a double occipital condyle, i.e. they have two knobs at the base of the skull which fit into the topmost neck vertebra, and other vertebrates have a single occipital condyle. But paleontologists use only the jaw joint and middle ear as criteria for identifying fossil mammals, because it would be very confusing if they found a fossil which had one feature but not the other.

Answer 3

Mamals means the kind of animals who belongs to the kingdom of Animalia.They feed thier babies by giving mothers milk.And also they dont lay eggs .The special thing is they havent a nuclear in their red blood cells.many members have long hair on their body to control their body temperature

Answer 4

The mammals are the class of vertebrate animals characterized by the production of milk in females for the nourishment of young, from mammary glands present on most species and specialized skin glands in monotremes that seep or ooze milk; the presence of hair or fur; specialized teeth; three minute bones within the ear; the presence of a neocortex region in the brain; and endothermic or "warm-blooded" bodies, and, in most cases, the existence of a placenta in the ontogeny...

Answer 5

Mamals are the group of animals whom feed their babies like men, whale are the members of this group.

Answer 6

any vertebrate of the class Mammalia, having the body more or less covered with hair, nourishing the young with milk from the mammary glands, and, with the exception of the egg-laying monotremes, giving birth to live young. a whale is also a mammal

Answer 7

Mamals are all fur bearing, warm blooded creatures, that bear live young

Answer 8

In Mammals, the females have the ability to feed the young ones/ otherwise known as suckling young mothers, that is, they tend to give an emotional bonding due to suckling, till the young ones can have their own food , that is solid food.

Answer 9

WHO FEED HER MILK TO OWN YOUNG ONE AND BORN BABY CHILD CALLED MAMALS.

Answer 10

a mamal is huge animal who have four chambered heart.and they mostly found in oceans.