What does it mean to be intelligent?If it's defined by having the biggest brain,then sperm whales(抹香鲸)—whose brain is 20 pounds —would be the brightest creatures on Earth.But,more likely,it's how a brain is wired.Viewed in this way,intelligence is what gives an organism the best ...
While hepatitis B spreads through sex, it’s unlikely that you’ll get it from oral sex unless you come into contact with blood. Can you get pregnant from oral sex? You can’t get pregnant from oral sex alone. Pregnancy happens when sperm fertilizes an egg, and the only way to access...
Generally, a man is considered to have a normal sperm count if he has 20 million sperm per milliliter of semen, but this number alone is not a definitive measurement of a man's fertility. This is due to the fact that the lab must also analyze motility to determine the percentage of th...
Where does blood cell formation take place? What are the three factors that act to bind cells together? What happens to red blood cells that are agglutinated? What distinguishes cancer cells from the cells of benign neoplasms? What changes will be observable when the organ system compensates?
What does a red blood cell have that a bacterium cell does not? What are primary endothelial cells? What do Sertoli cells secrete? What do chief cells secrete? What is meristem cell culture? What is one way that bacterial and archaeal cells differ from each other?
Abalone reproduce when the female releases spawn into the water – the males release sperm and fertilization takes place in the water. Each female produces millions of eggs each time she spawns. The males, of course, need to release even more sperm for the remote chance of fertilization taking...
Roderigo: Here is her father's house. I'll call aloud. Iago: Do, with like timorous accent and dire yell / As when, by night and negligence, the fire / Is spied in populous cities. Roderigo: What, ho, Brabantio! Signior Brabantio, ho! From Shakespeare's Othello; Act 1, Scene...
In 2008 a report was published showing XXY pubertal boys and men do indeed have sperms in their ejaculate, and may not be as infertile as first described by Dr. Harry Klinefelter. It may be that as XXY's age they become less and less fertile?
Just like the day of ovulation varies from cycle to cycle, so does the timing of these fertile days. Pregnancy can only happen when a sperm and an egg fuse, so both must be present. Unprotected sex up to five days before ovulation can lead to pregnancy. This is because sperm can ...
As the word benign suggests, BPH does not indicate severe diseases like cancer or other malignancies. However, it can cause some discomfort, as we will explain below. Figure 1: Enlarged prostate. What are the symptoms of BPH? Enlarged prostate symptoms can be subtle and as a result, remain...