Definition [edit]. Hypoxemia refers to low oxygen in the blood, and the more general term hypoxia is an abnormally low oxygen content in any tissue or organ, or the body as a whole.Hypoxemia can cause hypoxia (hypoxemic hypoxia), but hypoxia can also occur via other mechanisms, such as anemia.ypoxemia (or hypoxaemia in British English) is an abnormally low level of oxygen in the blood.
At first glance, the most obvious difference between bilateral and unilateral contracts is the number of people or parties promising an action. Bilateral contracts need at least two, while unilateral contracts only obligate action on one part. The other differences might be a bit more subtle.
So unless each party signs it it's likely not valid. and either party can sue and recover from the other for failure to perfom as promised. A unilateral contract need not be signed by both parties, but only by the obligor, i.e., the one making the promise. Example âI promisee to pay $5000 to whoever captures Jesse James and puts him in jail. signed, John Doe.â This contract is valid and enforceable even though only one party signed it.