The umbilical cord contains one umbilical vein and two arteries. Hope this helps.
answer:
When you increase the temperature of a substance its volume increases.(This is also known as Charles law~> T and V are directly correlated)
When the substances volume increases its density decreases.
Density:Mass/Volume
Hope this helps:)
Answer: Oogenesis
Explanation:
Oogenesis is a process in female reproductive system in which a matured ovum is formed from egg cell.
In human reproductive system one mature ovum is produced from four haploid cells during meiosis. This ovum is very large and it unite with the sperm to produce zygote.
There are three stages of Oogenesis, the multiplication phase,the growth phase and maturation phase.
In the multiplication phase, the germinal cells divide to form oogonia. The oogonia multiply and form oocytes. The oocytes pass through the growth phase and mature to form ovum.
It is an example of migration. Hope this helps!
