This process is known (respectively) as lymphatic or hematogenous spread. After the tumor cells come to rest at another site, they re-penetrate the vessel or walls and continue to multiply, eventually forming another clinically detectable tumor.[citation needed] This new tumor is known as a metastatic (or secondary) tumor. Metastasis is one of the hallmarks of cancer, distinguishing it from benign tumors. Most cancers can metastasize, although in varying degrees. Basal cell carcinoma for example rarely metastasizes.
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I think the answer is nervous system and muscular system work together but i could be wrong.
The answer is D. All of the above.
Hepatitis B virus (HBV) and HIV are bloodborne viruses transmitted primarily through sexual contact and injection-drug use.
Hepatitis B virus (HBV) and HIV are bloodborne viruses transmitted primarily through sexual contact and injection-drug use. Because of these shared modes of transmission, a high proportion of adults at risk for HIV infection are also at risk for HBV infection.
HIV, the hepatitis B and hepatitis C viruses can also be spread by sharing needles, syringes, and other injection equipment. It can transfer from mother to child Pregnant women can pass these infections to their infants. HIV-HCV coinfection increases the risk of passing on hepatitis C to the baby. The hepatitis C virus is usually spread when someone comes into contact with blood from an infected person.
To learn more about Hepatitis B , here
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