amphibians and mammals
A mammal is described as a vertebrate, which is warm-blooded, with some fur or hair all over its body. There are some features of a mammal that are common, considering both internal and external anatomy. Mammals are realized as diversified animals that can survive in most available habitat. Some of these traits are hair and fur, mammary glands, lower jaws with single bones, the tooth is replaced once in a lifetime, presence of three bones in the middle ear, and metabolism of warm-bloodedness. Additional traits include a heart with four chambers and the appearance of a diaphragm. Some characteristics are found in both mammals and other vertebrates like fish, reptiles, and amphibians. For example, there are everyday things found in both amphibians and mammals. The main similarities found in both mammals and amphibians are, they both have backbones and an improved nervous system.
The figures represent the female reproductive system of various animals. Also, all the animals have both sides functioning except for the ornithorhynchids, which has the left side functioning, accordingly. From the diagram, the one named (birds) resembles the ornithorhynchids. The left side is shown to function thus. The left side is active because it has ovary, uterus, the cloaca, and vagina. In addition, all mammals have the same reproductive system, as observed in the diagram. For example, there are common parts like the bladder opening and vagina, in the most female reproductive system of the mammals. Therefore, it can be concluded that mammals have most parts of their bodies, similar to one another, only varying is some few elements. Thus, it is confirmed that mammals, fish, reptiles, amphibians, and birds have some standard features, which make them surface, accordingly.
Evolution marks the process of the development of various living organisms. During growth, various parts of the body organism, partially or entirely, change into new pieces, with different features. Evolution is marked by the presence of gonads, responsible for the production of both eggs and sperms. Thus, the number of chromosomes reduced by half, hiking the cell number via cell division. In addition, evolution has contributed to the adaptation of the ornithorhynchids to its environment. As time goes by, the ornithorhynchids got used to the semi-aquatic environment. Other features, apart from the diagram, which has contributed to the evolution of the mammal are long-tail, furred body, and a streamlined body. Development is mostly provided by the climatic change, which affects the growth system of various types of animals. Thus, the diagram has involved much about the evolution of the ornithorhynchids female reproductive system.
Ornithorhynchus has a way of siring their children too. Most mammals give birth to their young ones. Platypuses are confirmed to lay eggs. The Ornithorhynchus is categorized in the monotremes species. In the act of the female Ornithorhynchus ready to have its young ones, it will dig its head in one of her tunnels. In addition, the female Ornithorhynchus lays small-sized eggs, which resemble the reptile’s eggs. These eggs get the chance of developing inside the body of the female Ornithorhynchus and are later put in one of her tunnels for about ten days. The young Ornithorhynchus grows in stages, and by the third stage, teeth are realized to develop accordingly. The mating period of the Platypus is between June and October. After two years, the male and female Ornithorhynchus mate and lay eggs to produce their young ones.