Collagen is a part of the connective tissue that in the skin helps in firmness, suppleness and constant renewal of skin cells. Collagen is vital for skin elasticity. Ligaments are another type of connective tissue that attach two bones and consequently hold the joints together.
There are at least 33 phyla (plural of phylum) of animals. Humans are members of the phylum Chordata. All of the chordates have elongated bilaterally symmetrical bodies. That is to say, the left and right sides are essentially mirror images of each other.
Humans belong in the Animalia (or animal) kingdom. Animals are complex multicellular organisms which rely on other organic materials, digested in an internal chamber, to susta â¦ in life.All animals are motile, which means they can move around spontaneously, using energy in the process.es. The human's phylum is Chordata (vertebrate). The human's class is mammalia. It's order is primate (the same as apes). It's family is Hominidae (apes that have no tail and â¦ can gather food with their hands.) The Human's sub-family is Homininae. It's tribe is Hominini.